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Some strings of 4 digits 2020-06-26
Judy pose la question :
I wrote previously and need more help. I need to generate a list of 4 digit. Numbers using 0-9 with no repetitions
I know that there is a 6 followed by a 2. Order does matter
Thank you in advance for your help.

Penny Nom lui répond.
Four digit combinations from 1-3-4-8-0 2020-03-26
nancy pose la question :
Good evening. I'm in a quandry. Can you help? I would like to know what 4-digit combinations can be derived from 1-3-4-8-0 no repetitions
Penny Nom lui répond.
What is the smallest 4 digit number? 2020-01-10
Ullas pose la question :
What is the smallest 4 digit number?
Penny Nom lui répond.
The fencing needed for a square pasture 2019-12-10
Penny pose la question :
I'm trying to calculate how many feet of fence I will need to fence a 4 acre square pasture.
Harley Weston lui répond.
Four fours 2019-10-03
Irene pose la question :
Using number 4, four times with any equation and the answer will be -2 and -5
Penny Nom lui répond.
Four digit numbers from 0, 1, 2 and 3 2018-11-30
A parent pose la question :
how many four digit numbers can be formed using nos.0,1,2,3 if repetition is allowed?
Penny Nom lui répond.
The area of a trapezoid 2018-09-24
An other pose la question :
AB-272 feet: AC 690 feet; CD-330 Feet; DA-669Feet Calculate the area in feet and Acres.
Penny Nom lui répond.
Four odd factors 2018-07-04
Manchali pose la question :
Find a number that has 4 factors and all of them are odd numbers.
Penny Nom lui répond.
What is small four-digit whole number? 2018-04-15
Rajesh pose la question :
What is small four-digit whole number?
Penny Nom lui répond.
A four digit pass code 2018-02-26
Jessica pose la question :
I was trying to fond out how many combinations could there be for a four digit pass code to a phone when no numbers are repeated?
Penny Nom lui répond.
The smallest and largest 4 digit integers 2017-06-13
Avneetpal pose la question :
Difference of the smallest and biggest 4-digit number
Penny Nom lui répond.
4 digit codes with repeating digits 2017-06-01
Morgan pose la question :
what are all possible 4 digit code repeating numbers? cuz i know that you have one website on it but, it doesn't repeat 2 numbers in a code.
Harley lui répond.
More on calculating the area (acreage) of a four-sided lot 2017-03-06
Kerri pose la question :

Can you please show the formula used to calculate areas as provided on this page:

Calculating the area (acreage) of a four-sided lot


Penny Nom lui répond.
Four digit numbers 2016-09-08
ning pose la question :
0000-9999 there is ten thousand 4-digit numbers. How to find the number of ways that 4 digit are the same? How to prove it by using formula?
Penny Nom lui répond.
The area of a 4-sided lot 2016-05-25
prasad pose la question :
How to find area of a land whose sides are 41ft,33ft,32.3ft and 33.2 ft. Pl give me the formula and proof.
Penny Nom lui répond.
A six digit code 2016-05-06
Ralph pose la question :
How many combinations are possible if a "safe" has four buttons and you can use a six digit code? (these are just single press buttons..)For example, this could be one possible combination: Button 4 Button 1 Button 1 Button 3 Button 2 Button 4. Thanks!
Penny Nom lui répond.
Subtraction in a base larger than ten 2016-01-31
Jenalee pose la question :
Hello,

So happy I found this site. I am having problems with bases. My question is 97B9 - 6A3A base 16 for both.

Please help.

Penny Nom lui répond.
Four consecutive integers 2016-01-05
sherica pose la question :
my teacher gave us an assignment and it says here that; THERE ARE FOUR CONSECUTIVE INTEGERS.IF THE SMALLEST ONE IS x ,FIND THE SUM OF THE FOUR INTEGERS. that is the question ...thanks hope that u can answer it
Penny Nom lui répond.
The perimeter of a 4 acre square 2015-12-16
samantha pose la question :
What is the distance in miles or how many laps to make a mile, if one was walking around 4 acres of land which is like a square?
Penny Nom lui répond.
Four equations in 3 unknowns 2015-08-23
damien pose la question :
solve:
S x U - T = 44
T - U x S = 36
U + T - S = 7
U x U / S = 4

Penny Nom lui répond.
20 golfers playing four rounds 2015-08-17
Paul pose la question :
I have a party of 20 golfers playing four rounds in fourballs. I realise that everyone will have 7 players that they do not play with, however I want to ensure that no one plays with the same person twice and that the Captain plays with the 12 players of his choice.
Victoria West lui répond.
The game of 24 2015-01-21
aaron pose la question :
24 game whants me to use 11 14 5 and 9 to make 24 allowed (+ - dividing and multiplying)
Penny Nom lui répond.
4 rounds of golf as three foursomes 2014-08-18
Christopher pose la question :
For our golf trip, we will be playing 4 rounds of golf as three foursomes. We would like to have each person play with everyone at least once. Is this possible?
Victoria West lui répond.
1÷[1-√2(order of surd is 4)] 2014-05-02
Anoushka pose la question :
if t=1÷[1-√2(order of surd is 4)] , then t=?
Penny Nom lui répond.
Four digit phone numbers 2014-02-25
Tom pose la question :
Hi, I'm an online math teacher, working on lessons for my students.

This question is in their book and I can't do it...! Help!

It has to do with phone numbers, and in this problem, we are only dealing with the last 4 digits of the number.

It asks how many possible numbers we have if at least one digit repeats in the last 4 digits of the number.

Penny Nom lui répond.
Four tangent circles 2013-10-09
Nilesh pose la question :
Four circular cardboard pieces, each of radius 7cm are placed in such a way that each piece touches two other pieces. How to find the area of the space enclosed by the four pieces?
Please let me know.

Robert Dawson lui répond.
Four equations 2013-08-08
may pose la question :
HI how to solve this 4 equations?
A+C = 0
-4A+B-8C+D=1
3A+16C-8D=-29
-12A+3B+16D=5

Robert Dawson lui répond.
Four circles 2013-05-29
varsha pose la question :
four circular cardboard pieces each of radius 7cm are placed in such a way that each piece touches two other pieces. find the area enclosed by the four pieces.
Penny Nom lui répond.
Four digit combinations starting with 7 6 2013-05-15
Kaye pose la question :
How do I find the rest of a four digit combination starting with 7 6?
Penny Nom lui répond.
A 4 digit code 2013-03-26
chris pose la question :
I saw a previous question about a 4 digit code type thing and I was wondering if you could email me that same type of thing. I changed the pin number on my phone's lock screen and I tried hard to remember it, then I had to go help my mom with something and I automatically forgot it and there is no way for me to get back on my phone. I need all of the possible 4 digit number combinations without the numbers 0, 1, or 2. It cannot be repeating, ascending, or descending.
I know you may not want to do all of them, but I really need it.

Robert Dawson lui répond.
f(x) + f ''''(x)=0 2013-03-05
Andreea pose la question :
Hei. I don’t speak lot of english but here is my question,hope u understand: f(x) + f ````(x)=0. so, my question. what is f(x), where f ````(x) is f(x) derivative by four time ? i tried to find the answer and i knew f(x) is something like that f(x)=e^x*sinx but miss something.
Brennan Yaremko lui répond.
Four digit "combinations" using 0124 2013-02-27
Ayana pose la question :
What are all the possible four digit combinations using 0124. Please list them for me. Thank you.
Penny Nom lui répond.
The zeros of a fourth degree polynomial 2013-01-23
Dakota pose la question :
My problem has multiple steps and I have done everything but the last one. 8The original problem is f(x)=x^4-5x^3+7x^2+3x-10 and I have to find the zeros of the equation. I used synthetic substitution like my teacher taught us to get the equation of x^3-3x^2+x+5=0 but now I don't know how to get the zeros of that equation, or solve it.
Penny Nom lui répond.
A 4 digit phone lock using the digits 4, 2, 3 and 0 2012-12-24
Ragu pose la question :
I would like to know formula for searching a combination of 4 digit. eg.

I knew my Phone Lock combination is my car plate number 4230. But this time, i used another way around instead of 4230.

But I am sure, there is only this 4 digits only. 4 & 2 & 3 & 0

Penny Nom lui répond.
Some 4 digit numbers 2012-10-25
samira pose la question :
How many 4-digit numbers are there in which the first and last digits are the same?
Penny Nom lui répond.
A four digit number 2012-10-09
cyndi pose la question :
find this 4 digit number: the tens digit is 1/3 of the hundreds digit; the 2 digit number formed by the tens and ones digits i the largest prime number smaller than 40; the sum of all 4 digits is the same as the number of face on an icosahedron ? what is the number?
Penny Nom lui répond.
Four tangent circles 2012-10-04
renu pose la question :
inside of a circle K of radius length measure R,three circular discs A,Band C each of radius r are placed so that each touches the other two and K . express R in terms of r. in the space between K, A and B , another circular disc D is placed which just touches K, A and B. if the radius is s, show that (6+root3)s=(2+root3)r
Penny Nom lui répond.
Four digit combinations from 1,2, ..., 9 2012-02-26
Errol pose la question :
show me a list with all four digit combination numbers from 0 -9
Penny Nom lui répond.
A four digit number 2011-09-16
gina pose la question :
i am having a hard time figuring this out.. i believe the answer is 3105 but the 0 is throwing me off... i am a 4 digit number between 3100 and 3200, none of my digits are even, the sum of my digits is 9, the largest digit is in the ones place, what number am i ??
Penny Nom lui répond.
Two line segments in the plane 2011-08-15
Tim pose la question :
For this problem I actually have tried to visualise the image in my head many times. This question makes my head spin.

Four points lie in a plane. They are partitioned into two pairs so that the sum of the lengths of the segments joining the points of each pair has the minimal possible value. Prove that these segments have no common points.

Chris Fisher lui répond.
The game of 24 2011-05-06
shaylin pose la question :
how do you use 3,9,7,9 once in any operation equal to 24?
Penny Nom lui répond.
1 and four eights inches 2011-02-01
Miranda pose la question :
WRITING TO EXPLAIN:If a line is measured as 1 and four eighth inches long,explain how you could simplify the measurement?
Penny Nom lui répond.
Golf pairings 2010-12-17
AL pose la question :
I have a golf tourney where we have fourteen players and are playing five times/rounds of golf. I am trying to pair up two threesomes and two foursomes so we don't play with the same person twice or the least amount of times.
Victoria West lui répond.
What numbers can I be? 2010-11-13
john pose la question :
my thousands digit is 2 times my ones digit.my hundreds digit is my ones digit plus 2. my tens digit is the difference between my thousands and hundreds digit what numbers can i be?
Penny Nom lui répond.
Four-digit numbers using 0,3,4,5,6,and 7 2010-11-12
Katy pose la question :
Using only the digits 0,3,4,5,6,and 7, how many distinct four-digit numbers exist that are greater than 4002 and less than 6732?
Stephen La Rocque lui répond.
The area of a 4 sided region 2010-07-14
Cliff pose la question :
If I wanted to know the square footage of an area that has four different sides and only had the length of one side and the angles at the ends of that length; could the other lengths be found if I wanted to have a total of 130,680 square feet?
Robert Dawson and Tyler Wood lui répond.
Four digit numbers 2010-05-22
tyeisha pose la question :
Whats all the four digit numbers you can come up with using numbers 0-9
Tyler Wood lui répond.
The game of 24 2010-02-20
haley pose la question :
hello.... we have these very hard make 24 stumpers. i am stuck on one.... how can you make 24 using the numbers 7-7-13-18?? thanks!
Claude Tardif lui répond.
Expressing the natural numbers in terms of 4 fours. 2010-01-19
Steve pose la question :
When I was studying mathematics, there were several of us that tried to express the natural numbers in terms of 4 fours. Allowing the use of any known math operation, for example n to the zeroth power is 1.Is there more info on this exercise. This was done mentally, nothing written down.
Robert Dawson lui répond.
Holiday for 7 golfers 2010-01-05
Andy pose la question :
I am having difficulty scheduling pairings for a forthcoming Golf holiday. There are 7 players and we will be playing 7 rounds - each round will be a 3 ball and a 4 ball. I am trying to work out a schedule that means everyone plays with each other roughly the same number of times (with a minimum of, say, 3 times if possible). Also, we are looking to ensure everyone plays in roughly the same number of 3 and 4 balls. Any suggestions would be much appreciated (we leave in 10 days time). Thank you.
Victoria West lui répond.
Four digit numbers with no repeats 2010-01-02
Daniel pose la question :
I want to know how many different numbers there would be between the numbers 0000-9999 that do not have any numbers that duplicate or repeat in the number? For example the first number would have to be 0123 and the last would be 9876 (I think) Thanks!
Penny Nom lui répond.
Four fours 2009-11-29
linda pose la question :
Four Fours order of operations challenge i need problems using 4's only that have an answer of 13, 18, and 19 than you
Penny Nom lui répond.
Four consecutive odd integers 2009-10-24
Tonya pose la question :
the sum of four consecutive odd intergers 2008 what are the intergers
Penny Nom lui répond.
Game of 24 2009-10-02
trami pose la question :
game of 24 by using -4 -7 -7 1?
Claude Tardif lui répond.
Game of 24 2009-09-24
vanessa pose la question :
Using the following numbers 13,6,6, and 12 to equal 24. Using 5th grade math
Penny Nom and Claude Tardif lui répond.
A four-digit positive integer 2009-09-04
TRACEY pose la question :
I AM A FOUR-DIGIT POSITIVE INTEGER SUCH THAT THE SUM OF MY DIGITS IS 18 AND MY DIGITS REVERSED ARE EXACTLY FOUR TIMES GREATER THAN MYSELF. WHAT NUMBER AM I?
Robert Dawson lui répond.
The game of 24 2009-08-27
ANITA pose la question :
Help I'm suppose to be a math expert, yet I can not yield 24 from the numbers 8,4,9,9, using each only once. HELP
Penny Nom lui répond.
The game of 24 2009-08-26
melvi pose la question :
how can you get the numbner 24 but only useing the numbers 7,5,4,5
Penny Nom lui répond.
Fourth and fifth degree polynomials 2009-08-20
Evin pose la question :
hello.i am a student . ax^4+bx^3+cx^2+dx+e=0 x=? i want to learn the solution or formula of equations of the fourth and fifth degree...PLEASE
Robert Dawson lui répond.
Game of 24 2009-05-22
Sam pose la question :
Using the numbers 7, 3, 2, and 2, how do you get the number 24?
Claude Tardif and Harley Weston lui répond.
Four-digit combinations 2009-04-18
Carri pose la question :
How many 4-digit combinations can be made out of digits 1, 2, 3, 4, & 5 using each number once? What are the combinations?
Penny Nom lui répond.
A four-sided lot 2009-04-12
Robert pose la question :
back of property is 137' across,with an angle of 122deg.on the left side and an angle of 140 deg. on the right side,the left side is 123' and the right side is 93' long,the left front is 130 deg. and the right front side is 150 deg. and the front of the property measures 78'
Harley Weston lui répond.
Four-digit numbers 2009-04-11
jp pose la question :
How many four-digit numbers are there?
Penny Nom lui répond.
Game of 24 2009-04-05
Ramona pose la question :
math 24 using 16, 9, 20, 7
Penny Nom lui répond.
Four digit numbers 2009-03-10
Theresa pose la question :
I need to know the number of 4 digit numbers that can be formed using 1-2-3-4 without repeating numbers
Penny Nom lui répond.
The game of 24 2009-03-01
Jeff pose la question :
My son in the 5th grade was given a problem for extra credit and could use parents help. He was given the numbers 21, 13, 9, 6 and asked to use each number only once by +, -, /, x the numbers in any order to obtain an answer of 24.
Harley Weston lui répond.
A four digit number 2009-02-12
alex pose la question :
the number of tens plus the number of hundreds equals the number of thousands. the number of ones is half the number of tens and one more than the number of hundreds the hundreds digit is 2. what is this four digit number
Penny Nom lui répond.
Four digit numbers using 1, 0, 2 and 8 2009-01-27
Mike pose la question :
How many combinations of this four digit number 1028 can this produce only using those numbers. Example would be 0000, 0001,0002,0008,0010,0011,0012,0018,etc...
Penny Nom lui répond.
Three consecutive natural numbers 2009-01-26
abby pose la question :
1.what is the smallest four-digit number that is the sum of the three consecutive natural numbers? what are the three consecutive natural numbers that give this sum?

2.what is the largest three digit number whose square root is a prime?

Penny Nom lui répond.
A four digit passcode 2009-01-12
john pose la question :
i have a machine at home that has a four digit passcode and the numbers range from 1 to 4 how can i get all the ways those numbers can be used
Harley Weston lui répond.
The game of 24 2008-11-24
Davey pose la question :
this has us all stumped. 5 ,5 ,7 ,and9 = 24. Oh may you assist in ending our brain pain
Penny Nom lui répond.
Forming 10 from 4 fours 2008-11-06
Corderro pose la question :
I need a answer for 10 using only the number 4
Penny Nom lui répond.
The product of the digits of a four digit number 2008-07-26
Pete pose la question :
I am a student preparing for a competition and this was one of the prep problems: The product of the digits of a four digit number is 6x5x4x3x2x1. how many such numbers are there with this property?
Stephen La Rocque lui répond.
Four fours 2008-06-25
jen pose la question :
Use four 4's and some of the symbols: +,-,X, / and (), to give expressions for the whole numbers from 0 through9. Example : (4X4+4)/4=5
Janice Cotcher lui répond.
The game of 24 2008-04-10
sherwin pose la question :
ok is like this you must get 24 using 1,5,5,5 but you can only use +, - , / and *
Claude Tardif lui répond.
The game of 24 2008-04-01
Frank pose la question :
Hi, my name is Frank. I have been really stumped on this 24-card. It has the 4 # of 21,3,5,10. If you have any suggestions, I would be grateful!
Claude Tardif lui répond.
I am a 4-digit number 2008-02-12
Nickie pose la question :
I am a 4-digit number with no repeating digits. I am divisible by 5, my first two digits (left to right) make a number divisible by 3, and my first three digits make a number divisible by 4. Also, my digits have a sum of 19 and I have the digit 7 in the thousands place. Who am I?
Penny Nom lui répond.
Four digit numbers containing 85 2008-02-06
Vonda pose la question :
How many four digit numbers contain the digit pattern 85 at least once and only once?
Stephen La Rocque lui répond.
The game of 24 2008-02-06
Jameeka pose la question :
What is a solution for 10,11,9 and 2 (Using fractions) in the game 24 square.
Penny Nom lui répond.
The game of 24 2008-01-17
Raina pose la question :
I have four numbers 3 3 9 5 that need to equal 24 using addition subtraction multipliction and division and I'm so stuck.
Chris Langdon, Stephen La Rocque and Claude Tardif lui répond.
The game of 24 2007-11-19
M pose la question :
Please help...how would you compute 2,2, 6, and 9 to equal 24?
Penny Nom lui répond.
The game of 24 2007-11-17
Todd pose la question :
Hello. My son is very good at the Math 24 game and when he is stumped, I am usually able to figure it out. However, we are both stumped with this one. The numbers are 6, 6, 9 and 5. You can use addition, subtraction, division and multiplication. Please help us equal 24 with those 4 numbers.
Claude Tardif lui répond.
Four digit odd numbers 2007-09-26
sonia pose la question :
how many 4 digit odd numbers can be made using the digits 2, 5, 7, and 8
Penny Nom lui répond.
Four digit combinations 2007-09-04
Natalie pose la question :
Using The Numbers 7 4 5

How many different 4-digit combinations are possible, you can use any of the numbers twice.

Penny Nom lui répond.
The digital lock for a cell phone 2007-08-29
Hollie pose la question :
i have a four digit lock code on my cell phone and cannot remember what it is. i know that it does not contain a 2 or a 4 and none of the numbers are repeated. the numbers range from 0 to nine and the only way to figure out what the code is, is to try randomly. I was wondering if you could give me a list of possible combinations using the information i gave you to make it easier to crack the code.
Penny Nom lui répond.
Four fours 2007-08-23
Belinda pose la question :
My son came home with a math question that I can figure out. He needs to use only the number 4 and only four 4's, no less no more. The problems need the answers 11,13,14,and 18. He can use any mathematical sign except square root. He's been able to get all but these so far and I've worked them, but can't come up with the problems. Can anyone help?
Stephen la Rocque lui répond.
Four digit numbers 2007-07-30
Spence pose la question :
My son has a problem that he has been unable to figure out. I was asked to try, but I am confused on how to get the last two parts. Any help would be great.
Thanks
Spence

How many four-digit numbers can be formed under each condition?

A) The leading digit cannot be zero: 9(10)(10)(10)=9000

B) The leading digit cannot be zero and no repetition of digits allowed: 9(9)(8)(7)=4536

C) The leading difit cannot be zero and the number must be less than 5000: ??

D) The leading digit cannot be zero and the number must be even: ??

Penny Nom lui répond.
24 four-digit numbers 2007-04-21
Megon pose la question :
Of the 24 four-digit numbers formed from the digits 1,2,3,&4 is there an easier way to find their sum other than writing them all out and totaling them by hand?
Stephen La Rocque lui répond.
A four digit number 2007-03-28
Paulo pose la question :
Hi , if i have to discover a keypad number of four digit , Which the closest combination of getting right?? i have this tips ---> i know the second and thirth number is odd . dont have the number 7 in any digit , Doesnt begin with 8 or 4 ... and dont have the 2 as a last number . Thanks !!
Stephen La Rocque lui répond.
The game of 24 2007-03-09
colleen pose la question :
We are playing the 24 math game where four numbers need to combine using any sign (+, - X, \) to equal 24. The four numbers are 22, 21, 6, 20.
Penny Nom lui répond.
Four digit numbers 2007-02-26
Anton pose la question :
Hello! I would like to ask you how many combinations are possible using 4 digit number. # # # # (1...9).There is no zero,numbers don't repeat,second and forth are odd.Thanks
Penny Nom lui répond.
Four 9s 2006-12-15
A student pose la question :
Can you make 67 with four 9's without using the ceilling method?
Stephen La Rocque lui répond.
Four digit combinations 2006-10-26
Sasha pose la question :
CAN YOU LIST ALL OF THE POSSIBLE 4 DIGIT COMBINATION'S, THAT DO NOT START WITH 0?
Stephen La Rocque lui répond.
Four fours 2006-10-08
Prabh pose la question :
Find out 10 BEDMAS problems using order of operation with only four 4's in the problem. The solution must be the digits 1-10. Example 44/44=1
Stephen La Rocque lui répond.
Four 4's 2006-09-10
Ying pose la question :
How can I use 4 four times, use any mathematical signs, such as +, -, times, division, ( ), !, square root to get answer 33, 41, or 45?
Stephen La Rocque lui répond.
Twenty golfers 2006-05-08
Mona pose la question :
We have twenty golfers and four rounds of golf. We would like to figure out how to make foursomes so that each golfer plays with as many different golfers as possible.
Penny Nom lui répond.
9, 8, 7 and 2 in the game of 24 2006-03-17
Alana pose la question :
I just began student teaching in a 5th grade math class and found that the students play 24 in class, a game that I used to play in elementary school. The students choose a card which shows 4 numbers and then have to use any combination of addition, subtraction, multiplication, and division to reach 24. There was one card that we found that seems to have all of us stumped. The four numbers are 9, 8, 7 and 2. Can you figure out how to make 24 with those? Thanks so much for your help!
Claude Tardif lui répond.
The game of 24 with 7, 5, 5 and 4 2005-12-18
Nicole pose la question :
i was playing the 24 game the other day. you get 4 digits and you have to turn them into 24. You can use addition, subtraction, division, and multiplication. You have to use all the numbers but you can only use each number once. an example is 2 4 4 1 the answer is (2x4)(4-1)=24. I got stuck on one. The numbers were 7 5 5 4 .
Penny Nom lui répond.
The game of 24 2005-10-10
Kim and Chris pose la question :
My 4th grade son came home with a math game called 24 game. In it each card has 4 numbers on it. Each number can only be used once, in any order, using multiplication, subtraction, division, or addition. We are stuck on one and wondered if you could help. The four numbers are: 9, 9, 9, 9. And they must equal 24. Any clues?
Claude Tardif lui répond.
The game of 24 2005-01-10
Manny pose la question :
HI - my daughter and I are being driven crazy by the following "24" question 7,7,3,3. She's good at the game (well, better than I am) and her teacher gave her this one. Any insight would be appreciated!
Claude Tardif lui répond.
The game of 24 2004-09-16
Angelica pose la question :
how can you make 24 out of 7,7,6,5?
Claude Tardif lui répond.
The game of 24 2004-09-14
Alan pose la question :
I was playing that math 24 game and i cant get 21,14,2,2 to equal 24
Claude Tardif lui répond.
The 24 game 2004-09-09
Erik pose la question :
Ive spent around 40 hours on this one problem. I need help. 3,3,7,7
Claide Tardif lui répond.
The game of 24 2004-06-04
Samantha pose la question :
i have the game 24 (the one where you have to use multiplication, division, addition, and subtraction to get to the answer 24) I was playing when i came across the 4 numbers 20, 17, 7, 11 and i cant seem to get 24.
Claude Tardif lui répond.
37 with four 4'2 2004-01-03
Myra pose la question :
Using four fours and only four fours to get an answer of 37.
Claude Tardif lui répond.
Four digit combinations 2003-12-31
A student pose la question :
i need all 4 digit combinations using 0-9 please
Penny Nom lui répond.
Four digit numbers 2003-11-20
Rob pose la question :
Hello, I sure hope you can answer this question. I got into a discussion at work about how many possible combinations there are for a four digit number using the numbers 0 through 9. This was in reference to a discussion about the lottery. I said there was only 10,000 possible combinations. My friend said that there was many times more, but he could not remember how to figure it out. The answer and the formula would be greatly appreciated.
Penny Nom lui répond.
The 4th difference 2003-11-17
Jack pose la question :
If i had a sequence which was the same at the 4th difference, aka difference to the 4th, like:

1 5 14 30 56 96 (sequence)
4 9 16 26 40
5 7 10 14
2 3 4
1 1

then what would be the set formulars to find out a, b, c, d, and e
as i know the equation has to be an4+bn3+cn2+dn+e

Penny Nom lui répond.
The game of 24 2003-09-03
A student pose la question :
We have a game where four numbers must equal 24 using addition, subtraction, multiplication and/or division.Ý I am stuck on the following four numbers - 12, 24, 9 and 17.
Penny Nom lui répond.
Two sequences that agree in the first 4 terms 2003-05-26
A student pose la question :
Is it possible to have two formulas that define sequences that agree on the first four terms but not the rest?
Penny Nom lui répond.
Four digit palindromes 2003-05-05
Heather pose la question :
How many palindromes were in between the numbers 1000 and 9999?
Penny Nom lui répond.
4 x abcd = dcba 2002-11-20
A student pose la question :
Say you have a four digit number (e.g. abcd) and you multiply the number by 4. The answer you get will be the reverse order of the number you started with (dcba). What is the number? The four digits (a,b,c,d) cannot be the same number or cannot be repeated.
Penny Nom and Claude Tardif lui répond.
The 24 game 2002-11-16
Michael pose la question :
Hello, my name is Michael and I am in elementary school .. We have a game we play in math class called 24 game. In it each card has 4 numbers on it. Each number can only be used once, in any order, using multiplication, subtraction, division, or addition. We are stuck on one and wondered if you could help. The four numbers are 10-9-16-4. And they must equal 24. Any clues?
Penny Nom lui répond.
The four colour theorem 2002-10-27
Rhonda pose la question :
is there an actual equation for the four colour map theorem??? i cannot find it anywhere!! if so can you give a breif description on how it works!!
Penny Nom lui répond.
Use a 4 four times 2002-09-12
Amanda pose la question :
The question is what is if you can only use a 4 four times and get the answer 12, 10, and 6
Claude tardif lui répond.
Sequences that agree on their first four terms 2002-05-16
Mike pose la question :
Are there two formulas that define sequences that agree on their first four terms, but differ on the fifth term and all succeeding terms?
Chris Fisher lui répond.
The square root of four 2002-04-13
Frank pose la question :
In a recent quiz we where asked the square root of four. The quizmaster gave the answer as not only 2 but also -2. Being pedantic I queried this. Although -2 squared is 4, does it follow that the root of 4 is -2 Can you enlighten us?
Claude Tardif and Penny Nom lui répond.
All four eights in three consecutive hands 2002-04-01
Blair pose la question :
What are the odds against the same person holding all four eights in three consecutive hands.
Brian Alspach lui répond.
Some 5 card hands 2002-03-28
A student pose la question :
From a standard deck of cards how many 5 card hands are possible consisting of a. exactly 4 hearts

b. two cards of one kind and three of another(like a full house).

Penny Nom lui répond.
100 from four 9's 2002-03-27
A student pose la question :
My teacher gave us a math problem to try and figure out and I am stumped. The problem was this.... by only using four nines, how can you get an answer of 100? You can add, subtract, multiply or divide...anything you need to do ,but you can only use four nines.
Leeanne Boehm lui répond.
Double square roots 2002-02-17
Ali pose la question :
i have a question about how to do double square roots with variables and powers.

example : v/"" v/"" 81y8


Harley Weston lui répond.
Making 24 2002-01-17
Renee pose la question :
My 4th grade daughter and I need to find a simple math sentence using 5, 5, 3, & 7 to equal 24. You can add, subtract, divide or multiple.
Penny Nom lui répond.
4 digit combinations 2001-09-22
Laura pose la question :
I need all of the 4 digit combinations using the numbers 0-9.
Harley Weston lui répond.
Fourier transform 2001-08-07
Adbul pose la question :
  1. Sir, we have the Dirichlet's condition for the Fourier transform : " The function should be integral over the real line " But why we are we neglecting this for example when we take the Fourier transform of an impulse train?

  2. Suppose we want to travel from one corner of a square of side 'a' to the diagonally opposite corner. We can travel along the sides which gives a pah length of '2a'. We can also do it in steps as shown below:

      _ | |_PATH |   |_ |_____| 


    Suppose The step size =DELTA x Then the path length will be again '2a'. Now in the limit DELTA x -->0 again we get '2a' But when we take the limit we get the straight line diagonal whose length is 'SQRT(2)X a' Where did I go wrong?

Chris Fisher lui répond.
Securing a plank in four dimensions 2001-06-06
Becca pose la question :
If it takes two nails to secure a plank from rotating on a wall in the third spatial dimension, how many nails would it take if you were attempting to secure the board from rotating in the fourth spatial dimension?
Walter Whiteley lui répond.
Four digit numbers from 1,2,3,4,5,6,7,8 2001-05-31
Katie pose la question :
Okay.......here's my question...how many different ways can you form a four digit number out of these digits..1,2,3,4,5,6,7,8? This is how my teacher said to do this.... 8*8, 7*7,6*6,5*5,4*4,3*3,2*2,1*1. then she said to add up the products and to multiply by 7. is this correct, and if not how can you figure this out.
Penny Nom and Claude Tardif lui répond.
Five fourths 2001-04-08
Linda pose la question :
Can you have 5/4 of something?
Penny Nom lui répond.
A four dimensional object 2001-02-14
A student pose la question :
Can you give me some examples of a four dimensional object you can find around your house?
Harley Weston lui répond.
Four crayons 2001-01-10
Neyra Espinoza pose la question :
You have four crayons (red, blue, yellow, green). If you line them up, how many different combinations can you get?
Patrick Maidorn lui répond.
4-digit numbers using 7, 8, 9 and 0 2000-09-13
Ryan pose la question :
Could you please help me with the following problem, How many different 4-digit numbers are there that use each of the digits 7,8,9,and 0? Please list them.
Penny Nom lui répond.
4 Color map Theorem 2000-06-02
Rick Slen pose la question :
I am challenging my students to find a map that can not be coloured using only 4 colours. I know that it is not possible, but one boy drew a map with a "country" totally surrounding all the others so of course it touched all other colours. How do I explain that this type of map is not permissable?
Denis Hanson lui répond.
Is a sheet of paper 2-dimensional? 2000-03-06
Jaclyn Evans pose la question :
One day, we were discussing 3-dimensional items. Is a sheet of paper considered a 3-dimensional shape? Or is it 2-dimensional as described by 8.5 by 11 size? Also, could you give me an example of a 4-dimensional item or scenario?
Harley Weston lui répond.
Four fours 1999-09-09
Roger pose la question :
I need help with a math problem my child asked me about I guess in her 7th grade math class they were told to come up with a answer from 1-10 only using four 4's and she got stuck on the problem that needs to be equal to ten, she asked me and I couldn't help her it's sad so if you could give me the problem and and answer so i could explain it to her I would really appreciate it.
Penny Nom lui répond.
Measuring the fourth dimension 1999-06-07
Suzanne Hall pose la question :
Hi! The other day, two of my students asked a very interesting question: Is the fourth dimension measured with hypercubes? Their reasoning went like this: Lines are 1D and are measured with line segments, which are part of a line. Planes are 2D and are measured with squares, which are part of a plane. Space is 3D and is measured with cubes, which are part of space. So, logically, hypercubes would be used to measure the fourth dimension.
Chris Fisher lui répond.
Four Corners Maths Problem 1999-02-16
Helen Williams pose la question :
I am currently a student teacher in the UK and I have to write a 1000 word report on the following maths problem which I am completely stuck on! PLease HELP!! Choose and 3 by 3 section of the hundred square. Add the total of the four corners. How many different groups of four numbers can you find that add up to that number? eg,
123
111213
212223
Total of 4 corners add up to 48.

Adding 2, 13, 22, 11 also make 48 etc..

How many different groups of 4 numbers would add up to 48?

How would these results compare with thoses obtained from a 3 by 3 square in which the numbers are consective? eg,
123
456
789

PLEASE HELP AS I AM COMPLETELY STUCK? WHY DO ALL THESE DIFFERENT WAYS ADD UP TO THE SAME NUMBER??
Harley Weston lui répond.

Grade 4 curriculum 1999-02-09
John pose la question :
My daughter is in grade 4 and her math teacher has asked her to write out the number 1 to 10,000. She is currently at 4567 and is sick of it. When I complained that this was not a usefull exercise she said that the Ministry of Education curriculum requires this and gave a photocopy of the page. It states: "read and write whole number to 10,000 in standard, expanded, and written forms (eg., 9367=9000+300+60+7 = nine thousand three hundred sixty-seven). Has the teacher interpreted this the wrong way?

Thanks John
PS. Do you have a web address for Ontario Math and Science Teachers organization?
Jack LeSage lui répond.

The Fourth Dimension 1998-05-24
Whitney Page pose la question :
Okay, here goes all my effort to try to explain shat I'm trying to ask of you. It's about something I read in a book called A WRINKLE IN TIME, by Madeline L'Engle. It's called tesser, or tesseract.

It talks about first diminsion, a straight line, second diminsion, a flat square, and third diminsion, a square with sides, front and back, top and bottom.

I can picture all of that. Then it says that fourth diminsion is when you square the three diminsional square. It also described the fourth diminsion as time. I can't figure out how that can be. Then it says...
Chris Fisher lui répond.

 
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