







quel sont les plus grands diviseurs communs? 
20050907 

Sylvain pose la question : quel sont les plus grands diviseurs communs? Claude Tardif lui répond. 





An arithmetic sequence 
20200404 

ally pose la question : 10 ... last term 35 common difference is 3
(a) find the number of term in the sequence.
i have lost the formula. Penny Nom lui répond. 





Two people are clapping their hands 
20191206 

Yukti pose la question : Two people are clapping their hands, but with different frequencies. Ramya claps her hands
17 times per 3 minutes, and Kumar claps his hands 31 times per 5 minutes. They start
clapping at the same time. How many times does each one clap before they clap together at
the same time again? Penny Nom lui répond. 





3/8 and 0.375 
20191205 

Zamyiah pose la question : how does 3/8 turn into 0.375 i just don't understand it the question is hard. please answer in time thank you for your time. Penny Nom lui répond. 





Packing chocolates in boxes 
20190722 

CHESKA pose la question : 1.levy can pack the chocolate bars either with 35 bars in a box,with 42 in a box, or with 49 in a box. what is the least number of chocolate bars that he has?
2. the blue light of a Christmas light blinks every 2 second. the red light blinks every 3 second and the yellow light blinks every 5 second. how many times will the three lights blink at the same tims in one hour?
3.a wooden straightedge can exactly measure an 825 cm rope, a675 cm rope, and 375 cm rope. what is the least possible length of the straightedge? how many times will it measure each rope? Penny Nom lui répond. 





An arithmetic sequence 
20190223 

Dalal pose la question : If x+1 and x+17 are the second and sixth term of a sequence with a common difference of 5, what's the value of x. Penny Nom lui répond. 





An arithmetic sequence 
20190131 

sara pose la question : if the 6th term of an arithmetic sequence is 8 and the 11th term is 2, what is the first term? Penny Nom lui répond. 





Converting decimals to common fractions 
20180508 

Ruth pose la question : what does the 0 represent in .018 versus the decimal .180? As in, changing these to fractions? Thank you. Penny Nom lui répond. 





A parallelogram, a rhombus and a rectangle 
20180207 

Sambo pose la question : what do parallelogram, rhombus and rectangle have in common? Penny Nom lui répond. 





An arithmetic sequence 
20171130 

yo pose la question : x; 2x+1; 11 are three consecutive terms of an arithmetic sequence.calculate x Penny Nom lui répond. 





GCD 
20171125 

A student pose la question : Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1. Penny Nom lui répond. 





Abstract algebra 
20171125 

A student pose la question : Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1. Penny Nom lui répond. 





An arithmetic sequence 
20170717 

abbi pose la question : hi there im a student in 11 grade
ive been trying to do this task but i have no idea how to do it
the question is
Find the common difference and the n^th term of the arithmetic sequence if the first term is 4 and the twentieth sum of the terms is 1030 Penny Nom lui répond. 





Baseball Cards 
20170420 

Raquel pose la question : A minor league baseball team gave away baseball cards to each person entering the stadium. One group receives 28 baseball cards. A second group received 68 baseball card. If each person entering the stadium receive the same number of cards, what was the greatest possible number of baseball cards that each person could have received? Penny Nom lui répond. 





Two boys on the same route 
20161206 

Abbey pose la question : Starting from the same spot, one boy completed a route in 9 minutes and another boy completed it in 15 minutes. When will both boys be at the same starting point at the same time again? Penny Nom lui répond. 





An airplane schedule 
20161014 

Stephanie pose la question : Starting at 8:00a.m., a passenger plane leaves from an airport every 6 minutes and a cargo plane leaves every 7 minutes. When is the next time these kinds of planes will leave at the same time? Penny Nom lui répond. 





An equation with fractions 
20160309 

Ed pose la question : 7/10___ +3/2=6/5 Penny Nom lui répond. 





A common tangent to two general parabolas 
20151115 

Kind pose la question : Hi,
I want to find the common tangent of two general parabolas, but i don't know if it's possible or not.
If it's possible, please make a tutorial.
The first parabola equation : Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0.
The second parabola equation : Gx^2 + Hxy + Iy^2 + Jx + Ky + L = 0.
I need this because i want to find the equation of Beloch fold. (Huzita  Hatori 6th axiom)
However if you know any other method to find Beloch folds equation, I am open for any suggestions. Chris Fisher lui répond. 





Factorise 15x + 15y 
20141120 

Jordan pose la question : hi i saw a question in class today that i didn't understand and i didn't really understand what my teacher was going on about so how do you factorise 15x + 15y Robert Dawson and Penny Nom lui répond. 





A factoring problem 
20141005 

Gina pose la question : 3x^2+6x+3 Penny Nom lui répond. 





An arithmetic sequence 
20140320 

Xabiso pose la question : The 10th term of an arithmetic sequence is 28 and the 7th term is 19. Calculate the common difference and the first term of the sequence. Penny Nom lui répond. 





The greatest common divider of n^23n1 and 3 
20140309 

Rimoshika pose la question : determine the greatest common divider (n^23n1,3) Penny Nom lui répond. 





Adding mixed numbers 
20131120 

Kathy pose la question : 1 3/4 + 1 2/3= ?
5 1/2  2 5/6= ? Penny Nom lui répond. 





An Arithmetic Progression 
20131008 

collins pose la question : In an A.P. the difference between the 8th and 4th term is 20 and the 8th is one and half times the 4th term... what is the common difference and the first term Penny Nom lui répond. 





{(1+x)^1/31/3X(1+x)^2/3}/(1+x)^2/3 
20130617 

STEPHEN pose la question : {(1+x)^1/31/3X(1+x)^2/3}/(1+x)^2/3 Penny Nom lui répond. 





Factoring 
20120426 

Amanda pose la question : y=x^29x Penny Nom lui répond. 





A common chord to two circles 
20120422 

Nicole pose la question : What is a common chord between two circles and how is it found in the problem: Two circles intersect and have a common chord, the radii of the circles are 13 and 15, the distance between the circle's centers is 14, find the common chord. Penny Nom lui répond. 





Simplify the expression 
20120212 

Christy pose la question : Hi guys, ok so I'm having problems with solving this equation since it's been so long I've done precal.
I have to find critical points so I have to find the derivative first. This is what I've done so far
s(t)= (t6)^4 * (t+1)^2
t'= 4(t6)^3*(1)*(t+1)^2+ 2(t+1)(1)*(t6)^4
so this is where I got stuck, which is the algebra part. How can I simplify this to get the answer to figure out the critical points. Penny Nom lui répond. 





8 3/8  6 1/4 
20110321 

lenora pose la question : explain an error pattern in each of the following. 8 3/8  6 1/4 = 2 2/4 Penny Nom lui répond. 





1/a^2 + 1/b^2 
20110119 

robert pose la question : If (a + b)^2 = 81 and ab = 18, find the value of 1/a^2 + 1/b^2 ? Penny Nom lui répond. 





A geometric progression 
20101215 

Abeth pose la question : find the value of x so that 2(x1), x+3, x will be a geometric progression. Penny Nom lui répond. 





x/200+x/400+x/600+x/800 
20101008 

Ashishthombre pose la question : step by step LCM of x/200+x/400+x/600+x/800 Penny Nom lui répond. 





Three cars 
20100830 

Anil pose la question : 3 cars are moving at speed of 4 kmph,5.5 kmph and 8 kmph in a circular track.The circular track has
a distance of 11 km. What is the time taken for all the 3 cars to meet at the starting point ? Stephen La Rocque lui répond. 





Algebraic fractions 
20100422 

rory pose la question : 3x/(x²64)+4/(x²6x16)= Robert Dawson and Harley Weston lui répond. 





A geometric sequence 
20100413 

glen pose la question : A geometric sequence has a first term of 0.1024, a second term of 0.256,
and a middle term of 156.25. how many terms are there in the whole
sequence?
i know that r=2.5 but i dont know how to find how many terms there are. Penny Nom lui répond. 





A geometric sequence 
20100222 

Kelsey pose la question : _, 2, _, _, 250, _
i don't know how to fill in the missing terms Penny Nom lui répond. 





Least common denominator 
20100213 

Priscila pose la question : 3/8 + 4/5 + 7/3 + 9/10 = ?
Thank you for your assistance.
Priscila Penny Nom lui répond. 





Combining fractions 
20100210 

Nick pose la question : Combine the fractions
2m/t + 5/mt Penny Nom lui répond. 





Two bus routes 
20100203 

kiyah pose la question : from 4:30 pm to 6:30 pm the route 1 bus stops every 12 min at the gym's bus stop. the route 2 bus stops there every 15 min. if both buses are now at the stop and schedule is kept, how long will it be before both buses will be at the stop again? Penny Nom lui répond. 





Common multiples of 36 and 48 
20090915 

Kamaldeep pose la question : Find the first 2 common multiples of 36 and 48. Penny Nom lui répond. 





Jogging and swimming 
20090911 

Brandon pose la question : Trevor swims jogs 3 days and swims every 4 days. How often does he jog and swim on the same day Leeanne Boehm lui répond. 





HCF 
20090803 

Nazrul pose la question : If (x+ a) be the H,C.F. of x^2+px+q and x^2+mx+n, prove that (pm)a=qn Stephen La Rocque lui répond. 





Highest Common Factor of Two Polynomials 
20090728 

Nazrul pose la question : If x+a be the h.c.f. of x^2+px+q and x^2+mx+n, how can I prove that (pm)a=qn. Robert J. Dawson & Janice Cotcher lui répond. 





how do I factor 45  5x^2 
20090531 

tracey pose la question : how do I factor 45  5x^2 Penny Nom lui répond. 





A geometric progression 
20090516 

sweta pose la question : find the ratio of GP if the first term is 1 and the sum of third and fifth term is 90. Penny Nom lui répond. 





Common multiples of 2 and 5 
20090423 

pat pose la question : what are the common multiples of 2 and 5, through 30, because i been working on it for hours Robert Dawson and Stephen La Rocque lui répond. 





Factor x squared(x3)+(x3) 
20090419 

Victor pose la question : How do I factor x squared(x3)+(x3) ? Harley Weston lui répond. 





A common tangent to two curves 
20090302 

Jay pose la question : For what values of a and b will the parabola y = x^2 + ax + b be tangent to the curve y = x^3 at (1,1)? Penny Nom lui répond. 





Two tangent circles and common tangents 
20081201 

Alan pose la question : Radius of big circle 30cm, radius of small circle 10 cm. From the diagram, the radius from the tangent do not form a semicircle but at an angle. Find the perimeter of the band around both the circle. May need to use trigonometry to find reflex angle AOB, CMD and get the major arc length AB and minor arc length CD Penny lui répond. 





How would put .12 with 2 repeating into a fraction? 
20080909 

Savanna pose la question : How would put .12 with 2 repeating in fraction?
Savanna! Penny Nom lui répond. 





Two tangent circles 
20080822 

Michele pose la question : A circle of radius 2 is externally tangent to a circle of radius 8,
How do you find the length of their common tangent. Penny Nom lui répond. 





Geometric sequences 
20080608 

Rita pose la question : A geometric sequence is given. Find the common ratio and write out the first four terms.
(1) {(5)^n}
(2) {(2^n)/(3^(n  1)} Penny Nom lui répond. 





Lowest common denominator 
20080531 

marlene pose la question : cant get the common lowest denominator of 10,46,64 Janice Cotcher lui répond. 





x/4 = 3 1/2 
20080530 

Kelsey pose la question : How do you solve for "X" in the problem below?
X
 = 3 1/2
4
Kelsey Victoria West lui répond. 





Converting a decimal to a fraction 
20080519 

judy pose la question : please explain how to get from the decimal number .3437 to the fraction 11/32 Leeanne Boehm lui répond. 





Two overlapping circles 
20080426 

Michelle pose la question : Two overlapping circles O and Q have the common chord AB (vertical line between the overlapping circles). If AB is 6 and circle O has a radius of length 4 (horizontal line going through the overlapping circles and touching the side of the circle) and circle Q has a radius of length 6, how long is OQ. Penny Nom and Walter Whiteley lui répond. 





The zeros of a cubic 
20080409 

Ryan pose la question : what are all the zeros of f(x)= x^31/2x^2+1/3x1/6 Penny Nom lui répond. 





Common fraction to decimal fraction 
20080401 

chadwick pose la question : how do I turn 3/32 into a decimal Penny Nom lui répond. 





Repeating decimals 
20080310 

Blaine pose la question : Is it possible to put a repeating decimal number into a calculator to solve a problem?
EX: Write 39.3939... as a fraction. Penny Nom lui répond. 





A common chord to two circles 
20080309 

shubha pose la question : please help me out with this problem.
find the length of the common chord of the intersecting circles x2+y24x5=0
and x2+y22x+8y+9=0 Stephen La Rocque lui répond. 





1.2 as a fraction 
20080112 

Confused pose la question : i have confused my brain and its driving me crazy i am trying to write 1.2 as a fraction but each time i do it i come out with a different number please help Penny Nom lui répond. 





LCM over 100 
20071209 

Aris pose la question : A teacher has more than 100 sweets. She thinks that if she give 6, 8 or 9
sweets to her students she will have no remaining in the case. What is the
smallest number of sweets in the bag? Stephen La Rocque lui répond. 





A percent as a fraction 
20071124 

Abby pose la question : write 43.75% as a fraction or mixed number in lowest terms. Penny Nom lui répond. 





Ordering fractions 
20071115 

DEL pose la question : Hi. I feel really stupid ! I'm a mature student and i have completely forgotten
How to find out the order of fractions from largest to smallest. I
Have been put this poser;
7/4...1/6....7/2
Can you please tell me what is the largest and lowest?
Will be very grateful....thank you Gabe Potter lui répond. 





How do you convert eleven fifteenths into a decimal? 
20071114 

Lauren pose la question : How do you convert eleven fifteenths into a decimal? Penny Nom and Stephen La Rocque lui répond. 





I need to order 3/11, 1/8, 2/9 from least to greatest 
20071019 

Andrew pose la question : I need to order 3/11, 1/8, 2/9 in least to greatest. Penny Nom lui répond. 





13 year and 17 year locusts 
20071012 

stefan pose la question : how many years pass between the years when both 13 year and 17 year locusts are out at the same time? Penny Nom lui répond. 





Least Common Multiples 
20070920 

Aiyanna pose la question : What is The Lcm Of 3,7,and 8 Because my Teacher gave me That and he didnt even know the answer....
I Worked and worked but I Couldnt Find It..... Penny Nom and Victoria West lui répond. 





Converting a repeating decimal to a common fraction 
20070822 

isabelle pose la question : how do you turn 6.333... into a fraction in simplest form? Stephen La Rocque and Penny Nom lui répond. 





Common factors 
20070819 

John pose la question : I have problem factorising 2p^3  34p. Please advise me. Leeanne Boehm, Steve La Rocque and Penny Nom lui répond. 





Adding algebraic fractions 
20070814 

John pose la question : Ive completely forgot anything to do with the subject mentioned, so my question is straight to the point..
I need to know how to do the following problem (Preferably do not give me an answer though)
(k/3k8)  (4/k+2) Penny Nom lui répond. 





Simplifying an algebraic fraction expression 
20070725 

Jessica pose la question : How do I simplify b/(b^{2}25) + 5/(b+5)  6/b? Stephen La Rocque lui répond. 





The lcm of polynomials 
20070531 

devin pose la question : x^38 , x^34, x^2+4x+4 Penny Nom lui répond. 





Students in rows 
20070517 

Ashi pose la question : the student of three classescan be made to stand into rows having same number of students. there are 24,36 and 60 students in the classes. how many maximum number of student will stand in each row. Stephen La Rocque lui répond. 





Greatest common divisor 
20070314 

Marie pose la question : How do I prove this?
Let h be the greatest common divisor of the positive integers a and b.
Show that there exist integers p and q (not necessarily positive) such that
pa + qb = h.
Thanks Penny Nom lui répond. 





A common tangent line 
20070220 

chris pose la question : I have this problem I have been working on for days and cannot figure it out. it states: Find the two points on the curve y=x^4  2x^2  x that have a common tangent line.
I know you use the first derivative to find the tangent line so if it is a common tangent line should you find two of the exact same tangent line equations at two coordinate points? Chris Fisher lui répond. 





Greatest common factor 
20070126 

Alexis pose la question : What is the greatest common factor of 52,and 100? Penny Nom lui répond. 





Common denominator 
20070110 

A parent pose la question : what is the common denominator of 3/5, 2/7 and 4/8? Stephen La Rocque lui répond. 





Order the fractions from least to greatest 
20070104 

Justin pose la question : I am a sixth grader, and I am having trouble with the last question in my homework assisgnment. 1/6, 2/5, 3/7, 3/5! Stephen La Rocque and Penny Nom lui répond. 





Least common multiple 
20061108 

Melenie pose la question : I have a daughter in 5th grade she can't seem to grasp the concept of finding LCM's does anyone have a quick easy way for her to learn????? Stephen La Rocque lui répond. 





The greatest common factor 
20061017 

Myrna pose la question : What is the greatest common factor of 49,164 and 80,860 Stephen La Rocque lui répond. 





Least common denominator 
20061004 

Paulette pose la question : Why is the LCD of 3/4 and 4/8 not the product of 4 and 8? Penny Nom lui répond. 





What is 1.7142857143 as a fraction? 
20061001 

Lizzy pose la question : What is 1.7142857143 as a fraction? Stephen La Rocque and Penny Nom lui répond. 





Least common multiple 
20060925 

A student pose la question : What is the LCM of 10,45 and 38? Stephen La Rocque lui répond. 





1/x + 1/y 
20060811 

Sonya pose la question : what is 1/x+1/y = ? is it equal to 1/x+y or what? Penny Nom lui répond. 





The greatest common factor of two numbers 
20060716 

Fadwa pose la question : What is the greatest common factor(GCF) of the following algebraic expressions? 1680 and 6048
Stephen La Rocque lui répond. 





The lowest denominator 
20060702 

Lisa pose la question :
What is the lowest denominator for the following numbers:
a) 26
b) 21
c) 47
Stephen La Rocque lui répond. 





How many people are in the race? 
20060407 

Marty pose la question : You're in a race with 1/5 of the racers ahead of you and 5/6 of them behind you. How many people are in the race? Penny Nom lui répond. 





Adding with mixed fractions 
20060330 

Becca pose la question :
can anyone help with how we change to get the same denominator with adding whole number.
example:8+7 3/8
6 1/2 + 2 5/6
Stephen La Rocque lui répond. 





Adding fractions 
20060326 

Barbara pose la question : I know that to subtract 1/4 from 2/3 I must find a common denom. Now the 2/3 becomes 8/12.....i understand the 12, but where does the 8 come from? Penny Nom lui répond. 





GCD 
20060320 

Jana pose la question : How can i prove:
if gcd(a,b)=1 then gcd(a+b,ab)=1 Penny Nom lui répond. 





The Least Common Multiple of two primes 
20060221 

Kristine pose la question : Is the Least Common Multiple to two prime numbers always their product? Why or Why not? Stephen La Rocque lui répond. 





Highest common factor 
20060206 

Sajid pose la question :
1.A rectangular field has dimensions 156 m and 84 m. It is to be fenced with wire netting supported by stakes, equally spaced, a stake being placed at each corner of the field. What is the greatest possible distance between any two stakes, given that it should be more than 2 m and less than 8 m?
2. What is the length of the side of the largest square tile which can be used to cover a floor 525 cm long by 275 cm wide without leaving a gap?
3. Find the greatest number which will divide 140 and 249 to leave remainders 8 and 18 respectively?
4. Find the greatest number which will divide 304 and 298 so as to leave remainder 4 in each case.
Penny Nom lui répond. 





GCF, LCM, primes and the ladder method 
20060107 

Linda pose la question : How would I teach both finding the GCF and LCM with prime factors...I recall the ladder method vaguely.??? Penny Nom lui répond. 





LCM 
20051212 

Alex pose la question : what is the LCM of 210 and 54 and the LCM of 42 and 126 Penny Nom lui répond. 





Common fractions to decimals 
20051125 

A student pose la question : how do u turn 8 over23 into a decimal and how do u turn 8 over 29 into a decimal Penny Nom lui répond. 





Adding improper fractions 
20051125 

Paula pose la question : I would like a simple step by step explanation on how to add improper fractions. Penny Nom lui répond. 





Rational expressions 
20051115 

Zach pose la question : I can solve easy problems such as (x/2)+3=2+(3x/4). That is easy because the Lowest Common Denominator is 4. But what really gets me stuck is a problem like this one.
(6/x2) = ( 21/(x2)(x+2) )+ 1. Penny Nom lui répond. 





Factoring 
20051030 

A student pose la question : Factor 18x^{3} y^{3} + 12xy^{2} Penny Nom lui répond. 





Least common multiple 
20051022 

Dayna pose la question : I'm stumped! I can't seem to come up with a least common multiple of 22 and 25. Is there one? Penny Nom lui répond. 





Isn't 1/3 written as a decimal .33? 
20050921 

Lisa pose la question : Isn't 1/3 written as a decimal .33? My son informs me I'm wrong, but doesn't know the answer
Chris Fisher and Penny Nom lui répond. 





A geometric sequence 
20050621 

A student pose la question :
The first three terms of a geometric series are 3(q+5), 3(q+3), (q+7) respectively.
Calulate the value of q. Penny Nom lui répond. 





The lcm of 5, 3, 4, 7 and 2 
20041105 

Christine pose la question : what is the lcm of 5,3,4,7,2 Penny Nom lui répond. 





The least common denominator 
20041103 

A student pose la question : Write the LCD for each pair of fractions.
13. 1/3,1/5
14. 2/7,1/4
15. 3/4,3/5 Penny Nom lui répond. 





The lcm of 1 and 1 
20041103 

Nayiyan pose la question : I would like to know what is the LCM of (1) and (+1) is. Penny Nom lui répond. 





GCD and LCM 
20041031 

Cartalina pose la question : how do you calculate the "positive difference between the GCF and LCM of two numbers"? Penny Nom lui répond. 





A common tangent line 
20041005 

Shanup pose la question : The xaxis is a common tangent of y = x^2 and y = x^3. Find the equation of another common tangent. Penny Nom lui répond. 





Rational expressions 
20040924 

A student pose la question : In general, I understand rational expressions except when it comes to solving problems such as:
x+y/2xy  2x/y2x or m4/3m4 + 3m+2/43m
I am confounded by the issue of having to find a common denominator. For example, if I tried to solve these problems by multiplying both denominators they would still be uncommon. Claude Tardif lui répond. 





GCD (a + b , a^2  ab + b^2) 
20040827 

Carol pose la question : Let a and b integer and relatively prime. Proof that:
GCD (a + b , a^2  ab + b^2) = 1 or 3 Penny Nom lui répond. 





The Parliament of the land of Achronia 
20040529 

Christine pose la question : The Parliament of the land of Achronia consists of two houses. The parliament was elected in 2003 for a period of six years beginning on Thursday, the 1st of January 2004, when the two houses had their first sessions. According to the rules, the meetings of the first house must occur every twelve days for the duration of the term, and the meetings of the second house must occur every eighteen days. For example, the second meetings of the first and the second houses were held on the 13th and 19th of January respectively. A new law can be passed on any day when both houses meet, except on a Thursday. On how many days can the parliament members pass new laws during this six year term? Penny Nom lui répond. 





Subtracting fractions 
20040511 

Filipe pose la question : Question:
_5_  __7__
6ab 8a Penny Nom lui répond. 





Common fractions to decimals 
20040212 

A parent pose la question : I'm trying to help my son work with turning fractions into decimals and this seems foreigh to me after 20 years of not being in school. Can you give me a few illustrations and/or examples of how to do that?? Penny Nom lui répond. 





A/30 + B/105 = (7A + 2B)/x 
20040205 

Jim pose la question : If A/30 + B/105 = (7A + 2B)/x and A, B, and x are integers greater than 1, what must x equal? Penny Nom lui répond. 





Adding fractions 
20031116 

Ken pose la question : My name is Ken and I am taking my GED course for my High School and have not been in a class for 35 years. I am doing this for retraining. I am at the part about fractions. Here is an example that I am having trouble with.
1 3/7 + 4 2/3 + 11/21
They have no common denominators. Could you PLEASE help me. If you could send me a step by step explanation it would be greatly appreciated. Penny Nom lui répond. 





Greatest Common Factor 
20031108 

Beth pose la question : How do you use the Greatest Common Factor in addtion and subtraction of fraction? Penny Nom lui répond. 





Subtracting rational expressions 
20030510 

Simone pose la question : hi, i'm totally lost. i understand that you need to find a lowest common denominator to subtract two fractions (rational expressions) with different denominators. but what if the denominators are "x1" and "x". is x the common denominator? if so what happens to the "1"? do you know of any live online help i can get with the following: 3/(x1)  (12x)/x i've looked through my notes and have no examples that quite match that i can follow to get through it. please help! Penny Nom lui répond. 





Multiples of all four of the numbers 2, 3, 4, and 5 
20030211 

Stephanie pose la question : How many of the first 1000 positive integers are multiples of all four of the numbers 2, 3, 4, and 5? Penny Nom lui répond. 





Some 5th grade problems 
20030124 

Sabrina pose la question :
[What is the greatest common factor of 20,28, and 36?] next problem is [5k+7(k+8)= ] next problem [Curtis simplified 0.8 divided by 0.2 x 0.04 and got 10. Latoya Simplified and got 1.6. is either correct? Can you explaine how you got the answer please.] Penny Nom lui répond. 





The least common denominator 
20030121 

Brittan pose la question : Hi there I need help! My name is Brittany and i am in the 6th grade. I need help finding the least common denominator(LCD), and the book says Find the LCM of the denominators and i've done that and then it says write equivalent fractions,using the LCM as the least commonn denominator.The directions say Use the LCD to write each pair as like fractions. and the problem is 1/8 and 5/40. Could u explain how in the word u do this? Thanks a lot Brittany Penny Nom lui répond. 





Composites, primes, factors and common factors 
20021120 

Connie pose la question : My son can't remember what a composite number is, what a prime number is and the explaination of factors and common factors. Help! Penny Nom lui répond. 





Why is 5 divided by 1/7 greater than 5 divided by 2/3? 
20021119 

Elizabeth pose la question :
 Without performing the division, explain why 5 divided by 1/7 is a number greater than 5 divided by 2/3.
 Is the least common multiple of two prime numbers always their product? Why or why not?
Diane Hanson and Penny Nom lui répond. 





Rational expressions 
20021003 

Ashley pose la question : 1/x(squared) + 5/xy Penny Nom lui répond. 





Common Denominator 
20020826 

Slobodanka pose la question : What is a Common Denominator? Penny Nom lui répond. 





Factor 12x^2  20x  8 
20020430 

Crystal pose la question : Factor Completely: 12x^{2}  20x  8 Penny Nom lui répond. 





Common fractions to decimal fractions 
20020402 

Natalie pose la question : My questions are: "how can I change 23/60 into a decimal. and give my answer to 2dp."?????????? 2nd question:for each of these pairs, which is bigger?
4/7 or 36%____________ 3/11or 0.29____________ 14/24 or 0.57___________ Penny Nom lui répond. 





The reciprocal of a decimal mixed number 
20020329 

A student pose la question : How do I find the reciprocal of a decimal mixed number? Penny Nom lui répond. 





24x^4 + 3x 
20020318 

gary pose la question : 24x^{ 4} + 3x Penny Nom lui répond. 





Factor completely 
20020307 

Taylor pose la question : I'm supposed to completely factor this but I don't know what to do with all the variables. a^{3}b^{5}  a^{2}b^{5}  12ab^{5}. Does it have anything to do with b^{5} being a common factor or am I completely off? Penny Nom lui répond. 





Reduce 79,537/3,623,420 
20011213 

Eliana pose la question : How do you reduce 79,537/3,623,420. Claude Tardif lui répond. 





Manufactures golf balls 
20011106 

Kevin pose la question : A company manufactures golf balls. Golf balls are each numbered consecutively 0 to 4, and then the numbering starts over with zero again. Every 12th golf ball is yellow. Every 8th golf ball is tested for defects. The company produces 120,000 golf balls in an eighthour shift. A. How many yellow golf balls are tested for defects during the day? Explain your reasoning. B. How many of these yellow balls that are tested are imprinted with the numeral 2? Explain your reasoning. Penny Nom lui répond. 





Locusts 
20011008 

A parent pose la question : JOHN CONJECTURED THAT BOTH 13YR.&17YR. LOCUSTS CAME OUT THE SAME YEAR. ASSUME IT IS CORRECT. HOW MANY YEARS PASS BETWEEN THE YRS. WHEN BOTH 13 YR. & 17YR. LOCUSTS ARE OUT AT THE SAME TIME? EXPLAIN. NEXT, SUPPOSE THERE WERE 12YR.,14 YR.,& 16YR. LO CUSTS,& THEY ALL COME OUT THIS YR. HOW MANY YRS. WILL IT BE BEFORE THEY ALL COME OUT TOGETHER AGAIN? Leeanne Boehm lui répond. 





GCD and LCM 
20010924 

David pose la question : Find the GCD adn LCM of the following numbers. Assume p 2 to the power p, 3 to power q, 5 to power r and 2 to power q, 3 to power r, 7 to power p Penny Nom lui répond. 





4x(2x1)+(2x1)^{2} 
20010917 

Nick pose la question : how do u solve 4x(2x1)+(2x1)^{2} Penny Nom lui répond. 





Common solution 
20010602 

Samantha pose la question :
 Solve for common solution: x+y=6 2x3y=2
 Solve for y in terms of x: 3xy=4
Penny Nom lui répond. 





Greatest Common Factor 
20010509 

Nicole pose la question : What is the Greatest Common Facter for:
126,261 1008,1080 546,1995 128,256 and 255,256 Penny Nom lui répond. 





Adding and subtracting rational expressions 
20010503 

Donna pose la question : Adding and subtracting Rational expressions. I am in grade 10 and I am a student here is an example of the questions: 1/(x+1)  1/(x1) = ? Penny Nom lui répond. 





Common tangents 
20010408 

Anne pose la question : I have been working on this problem for a while but I'm not sure I'm getting the right answer: Find the common tangents of 2y=x^{2} and 2y=x^{2}16 Thanks for the help. :) Harley Weston` lui répond. 





A four digit number 
20010217 

Dean pose la question : Need to find a 4 digit number that can be divided by 2, 3, 4, 5, 6, 7, 8, 9, and will always have a remainder of 1 in the answer. Penny Nom lui répond. 





Two number theory questions 
20010130 

Richie pose la question : i have two questions and they are:  the product of three consecutive prime numbers is 7429. Find the product of the smallest and largest of these three integers.
 the least common multiple of two relatively prime positive integers, a and b, is 144. if a (a>or=2) is as small as possible, compute the value of b.
Penny Nom lui répond. 





Factoring a trinomial 
20010124 

Kyle pose la question : I am an eighth grade student.I can not figure out the following problem. 4x^{2} + 2x  20 Leeanne Boehm lui répond. 





Greatest common factor 
20010117 

A teacher pose la question : I'm a teacher at a local Middle School and I would like the answers for the following questions. What is the greatest common factor for.. 546 and 780 156 and 732 . . . Leeanne Boehm and Penny Nom lui répond. 





A pair of numbers whose GCF is 28 
20001227 

John pose la question : Name 2 different pairs of numbers whose GCF is 28. Penny Nom lui répond. 





Factoring (uv)^{3}+vu 
20001215 

A parent pose la question : I am a middle school teacher and a parent. I am snowed in and trying to help my 9th grader get ready for 9 weeks exams. I have tried to factor this problem to no avail. (uv)^3+vu. I have the answer but I need to know how it is done. Penny Nom lui répond. 





Factoring a cubic 
20001031 

A student pose la question : Factor Completely 18p^{3}  51p^{2}  135p Paul Betts and Penny Nom lui répond. 





LOG(LN(x)) = 1 
20000728 

An algebra student pose la question : LET F(x)=LOG X AND G(x)= LN X. SOLVE (f *G)(x)= 1 SHOW COMPOSITION AND USE DEFINITION OF LOGS. Harley Weston lui répond. 





Factoring, primes, GCF and LCM 
20000227 

Ruth Kroek pose la question : My son is in grade seven, he has to do a Factoring Booklet the areas covered are:  Prime #'s
 Composite #'s
 Rainbow Factoring
 Finding Multiples (consecutive multiples)
 Finding GCF of 23 numbers uning Rainbow factoring
 Finding LCM of 2 numbers using consecutive multiples
 prime factor trees
 prime factor ladders
 finding GCF of 2 numbers using Prime number Method
Although his text 'Math Power' gives some information, we are at a loss .. Penny Nom lui répond. 





Least Common Multiple 
20000216 

Kathy Heath pose la question : The way I understand it is for 2,3,9 the least common multiple is 18. Am I right? If so, I guess the least common multiple for 3,4,7 is 105. Please let me know if I'm right so I can tell my daughter. Denis Hanson lui répond. 





Climbing stairs 
19991222 

Harman Chaudhry pose la question : Paul, Michelle and Michael all climb up 54 steps. Paul climbs the steps one at a time i.e. 1, 2, 3, etc. Michelle Climbs the stairs 2 at a time i.e. 2, 4, 6, etc. Michael climbs the stairs 3 at a time i.e. 3, 6, 9, etc. How many steps are used by exactly two people? Penny Nom lui répond. 





Common factors 
19991006 

Tommygirl98 pose la question : Ok I have a question about common factoring I'm not to sure if you could help me but it's worth a try here it goes. Ok I have a test on Friday and i'm having trouble understanding how to do it here's an example, Factor, 10 + 2b how do you do it and what do they mean by factor? Penny Nom lui répond. 





Jose and Arthur 
19990926 

Joel Hammer pose la question : Jose can run around the track in 40 seconds. Arthur runs with Jose but in the opposite direction. They meet every 15 second. How long will it take Arthur to make one trip around the track? Denis Hanson lui répond. 





Repeating decimals 
19990918 

Kavoos Bybordi pose la question : I dont know how to change a reccuring decimal to a fraction please could you tell me the method. Penny Nom lui répond. 





Where three sequences meet. 
19990306 

Ali pose la question : My name is Ali and I am in the 5th grade. I have a math question: What is the least positive integer meeting each of the following conditions:  Dividing by 7 gives a remainder of 4
 Dividing by 8 gives a remainder of 5
 Dividing by 9 gives a remainder of 6
Help! Denis Hanson lui répond. 





The Board Problem 
19990215 

Avery pose la question : Mr. Avery has 3foot boards and 4foot boards. If he puts the 3foot boards in a line, they have the same length as the 4foot boards put in a line. Altogether he has between 16 and 25 boards. How many 3foot boards does he have? Jack LeSage and Penny Nom lui répond. 





Adding Fractions 
19981003 

Pam Bailey pose la question : Can you help me simplfy this? (1/2a + 1/3b)  (1/4a  1/5b) + (1/6a  1/7) thanx Harley Weston lui répond. 





Greatest Common Factor. 
19980109 

Percy Stribling pose la question : how do you figure out what the greater common factor is? Penny Nom lui répond. 





Fractions 
19971020 

Rebecca Henry pose la question : When we add fractions, we find a common denominator and add the numerators When we multiply fractions, we simply multiply both numerators and denominators with no regard to commonality.  Why do we not have to find a common denominator when multiplying?
 Why do we multiply both numerators and denominators?
Chris Fisher lui répond. 





Two Questions 
19970828 

Faye Tan pose la question : I am a trainee teacher. I would appreciate it very much if you could help me solve the following two problems which I think are meant for students at middle grade. 1. If a hen and a half lays an egg and a half in a day and a half, how many hens are needed to lay a dozen eggs in one day? 2. There are fewer than 200 passengers on a train. If they get off in pairs, one passenger will be without a partner. If they get off in groups of 3 or 4, there will still be one passenger left by himself. However, if they get off in groups of 5, no one will be left by themselves. How many passengers are there on the train? Penny Nom lui répond. 





A Question About Pi. 
19970708 

Mike Chan pose la question : I have read the section Repeating Decimals in your data base. It mention that 1/17 has at most only 16 repeating digits. But, why does "pi" have an infinite number of digits (and not repeating ). Penny Nom lui répond. 





How many digits are there in 2^2520? 
19961007 

Rita Leung pose la question : A)The number 64 is a sq., a cube, and a sixth power because 64=8*8, 4*4*4, 2*2*2*2*2*2. Find the smallest integer greater than 1 that is a sq., a cube, a 4th, 5th, 6th, 7th, 8th, 9th and 10th power. I have found that the answer is 2 to the power 2520th. B) How many digits are in the correct answer to part A? The answer is uncertain. It is either 758 or 759. Can you give me any ideas? Penny Nom lui répond. 

