







Strings of characters 
20151228 

Ali pose la question : If I have an app and offer a two, three and four digits name and it can be only number, letters or both?
I want to know how many options will I have for each?
For example
the two digits: aa, 11, a1 or 1a
the three digits: 111, a2a, 222
the four digits: 1111, 2ge3 or 1234
So if I used all the letters and all the numbers but nothing starts with a zero
How can I calculate them separately? Or what's the result for each?
Thank you
Ali Penny Nom lui répond. 





Base 6 
20140910 

Amanda pose la question : using base 6, what is the next number after 25? 35? 55? and 455?
I need to be able to show the base 6 material. Penny Nom lui répond. 





Counting in base five using words not digits 
20140125 

Randy pose la question : We all know how to count (in the base 10/decimal system) using words not numbers. For example: one, two, three, four, five, six, seven, eight, etc. However, in base 5 (for example) how would you count (in words). For sure  in base 5 the number 1 could be "one", the number 2 could be "two". However there seems to be no words to describe base 5 numbers beyond 0,1,2,3 and 4 (and perhaps 10). In base 5 the number 10 is not ten. Rather it is "five". In base 5 what word(s) describe numbers larger than 10? What words are used for 11, 12, 13, 14, 20, 21, 22, 23, 24, 30, 44,...etc. Also, consider a man and woman were married in the Gregorian year 1964. If they had an anniversary tomorrow  how long would you say they've been married in base 5 speak? In numbers their Golden Anniversary would note 200 years of marriage in base 5. How would you articulate their years together in base 5? I don't recall seeing verbiage to represent numbers in any system other than the decimal/base 10 system. Do such things exist for other systems? Harley Weston lui répond. 





Possible soccer scores 
20121009 

Riaan pose la question : Good day, I would like to know all the possible scores for a set of 5 soccer matches with no more than 5 total goals being scored in any match.
Bearing in mind that there are three outcomes to every match. Win, Lose or Draw.
Could you please help me with this?
Kind regards
Riaan
South Africa Penny Nom lui répond. 





What is the 6001st digit that Sam wrote? 
20110215 

Sarah pose la question : Sam wrote the natural numbers from 1 to 5280 in order. What is the 6001st digit that Sam wrote? Penny Nom lui répond. 





Counting by sevens 
20100413 

Larry pose la question : Lee counted by 7's beginning with one of the whole numbers from 1 through 7, until Lee passed 1000. If Lee counted
three of the following numbers, which number did Lee NOT count?
a. 107
b. 184
c. 534
d. 641
Robert Dawson and Penny Nom lui répond. 





Why is the difference between british and american counting? 
20081215 

Muhammad pose la question : Why is the difference between british and american counting?
Example 1 Billion american = 1,000,000,000 but,
1 Billion British = 1,000,000,000,000 Robert Dawson and Harley Weston lui répond. 





Aboriginal number groupings 
20080904 

Barbara pose la question : Our current place value system is based on the notion of 10s. Did Aborginal people use a similar system or did they group numbers differently? Harley Weston lui répond. 





How many cubes have one face painted red? 
20071127 

Ashutosh pose la question : A rectangular block measuring 10 units by 8 units by 6 units is made up of cubes measuring 1 unit on a side. The base of the block is 10 units by 8 units. The outside of the block other than the base is painted red. How many of the unit cubes have exactly one face painted red? Stephen La Rocque and Penny Nom lui répond. 





Segments on a line 
20070910 

Cathy pose la question : This question was on my daughter's geometry assignment. Write a general rule of formula for finding the number of segments that can be named by a given number of points on a line. For example, 2 points on a line = 1 line segment; 3 points on a line = 3 segments; 5 points on a line = 10 segments. Penny Nom lui répond. 





Four digit numbers with at least one three 
20070815 

Alberto pose la question : How many fourdigit numbers are there which contain at least one digit 3? Stephen La Rocque lui répond. 





How many diagonals does a polygon have? 
20070718 

Edna pose la question : how do you find the numbers of diagonals of a polygons? Stephen La Rocque lui répond. 





Counting squares 
20070512 

Bridget pose la question : Explain how many squares there are on a board measuring 4 by 4 units, Stephen La Rocque and Penny Nom lui répond. 





Choosing a bicycle 
20070328 

Jackie pose la question : A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of two colors, red and blue, and with a choice of three seats, soft, medium, and hard.
a) Use the counting principle to determine the number of different arrangements of bicycles that are possible.
b) Construct a tree diagram illustrating all the different arrangements of bicycles that are possible. c) List the sample space. Penny Nom lui répond. 





Six digit numbers 
20070209 

marisa pose la question : how many six digit numbers can you write using the digits 0 and 1 as many times as possible? Stephen La Rocque lui répond. 





How many sequences are possible? 
20061028 

Sam pose la question : A fair eightfaced die with faces numbered 1,2,3,4,5,6,7 and 8 is tossed six times and the sequence of numbers is recorded. How many sequences are possible? Penny Nom lui répond. 





Math and using fingers 
20061026 

Portia pose la question : Should students be allowed to use their fingers to learn math and why Walter Whiteley lui répond. 





A remainder of 1 
20060913 

Juan pose la question : What is the smallest counting number which when divided by any of the numbers 2,3,4,5,6,,7,8,9 and 10, leaves a remainder of 1? Paul Betts and Claude Tardif lui répond. 





Four digit numbers 
20060325 

Kenvin pose la question : i was wondering how many possibilities is there for a four digit number with the same first two numbers and the last two is not one of the first with numbers 19 Stephen La Rocque lui répond. 





Five digit numbers 
20060325 

Tony pose la question : Can someone tell me how many unique five digit numbers can be generated using 09? Stephen La Rocque and Penny Nom lui répond. 





Counting digits 
20060130 

Cynthia pose la question : I would like to know the easiest way to calculate the
total numbers of digits used by a printer to number the pages of a book from 1 to 250. Penny Nom lui répond. 





More on the origin of integers 
20051220 

A student pose la question : have a math extra credit project and we have to go online and look up the origin of integers and I can't find it anywhere do you know?????? Harley Weston lui répond. 





5 digit numbers that include 5 and exclude 8 
20051104 

Paul pose la question : figure out
how many 5 digit numbers are there that include the digit 5 and exclude the
digit 8.
show me how to do get to the answer. (23816) Paul Betts lui répond. 





Divisibility by each of the first ten counting numbers 
20051017 

Simon pose la question : determine smallest positive integer that is divisible by each of the first ten counting numbers Penny Nom lui répond. 





Can one place 15 integers around a circle... 
20050820 

Hernan pose la question : Can one place 15 integers around a circle so that the sum of every 4 consecutive numbers is equal either to 1 or 3? Claude Tardif lui répond. 





The number of four digit combinations 
20050809 

Kevin pose la question : My 12 year old has asked me how to figure out the number of four digit combinations possible using 0 thru 9 without repeating a number? Penny lui répond. 





In how many ways can 12 different fruits be distributed 
20050613 

Sapta pose la question : In how many ways can 12 different fruits be distributed among 3 boys so that each receives at least 1 fruit? Claude Tardif lui répond. 





A six digit answer 
20050518 

Angela pose la question : I have a 6 digit answer that is comprised of only 4 symbols: a square, a circle, a triangle, and an X. How many possible solutions are there and how is the best way to find out what ALL the solutions are? Penny Nom lui répond. 





There are 4 contestants in a bicycle race. 
20050105 

Robert pose la question : There are 4 contestants in a bicycle race. In how many different orders can they cross the finish line? Penny Nom lui répond. 





Six digit numbers with at least one 7 
20041227 

Behzad pose la question : How many sixdigit numbers contain at least one 7 in their decimal expansion? Penny Nom lui répond. 





Visitor wins or home wins 
20040929 

Paavn and Laddi pose la question : I have a math question i am stumped on for one of my classes. The question states that there are 14 baseball games with 2 possible outcomes for each game, visitor win or home win. How many different total combinations are possible from the 14 games? Penny Nom lui répond. 





Baseball games 
20040314 

Fabian pose la question : Let's say I have 12 different Baseball games. There is one of only 2 possible outcomes for each of the 12 games. How would I fugure out how many combinations there are for the 12 games and for 11,10, and so fourth.
Penny Nom lui répond. 





Pairing boys and girls 
20040201 

Terri pose la question : Suppose 7 boys and 7 girls are assigned to work in pairs of one boy and one girl. Explain what equation can be used and how you would use a simpler problem to solve these types of questions. Penny Nom lui répond. 





Six letter words 
20040117 

Debora pose la question : An anthropologist discovers an isolated tribe whose written alphabet contains only six letters (call the letters A, B, C, D, E, and F). The tribe has a taboo against using the same letter twice in the same word. It's never done. If each different sequence of letters constitutes a different work in the language, what is the maximum number of six letter words that the language can employ? Penny Nom lui répond. 





Chisenbop 
20031106 

Jaclyn pose la question : Hi there i was wondering if you would have any information on "counting on your fingers" or " Chisabop". Penny Nom lui répond. 





nine digit numbers 
20030723 

John pose la question : With a nine digit number, with each of the nine digits having a possibility of 10 different numbers then what is the total number of possible mathematical variations in the nine digit number. i.e. Social Security numbers have nine digits and if each of the nine digits have a possibility of being any one of ten numbers, i.e. 0,1,2,3,4,5,6,7,8,9. Then what is the formula to calculate the maximum possible number of variations in this nine digit number and what is the mathematical maximum possible number of variations of this nine digit number? Penny Nom lui répond. 





Mary typed a six digit number 
20030306 

Pillar pose la question : Mary typed a six digit number, but the two 1's did not show. What appeared instead was 2002. How many different sixdigit numbers could she have typed? Penny Nom lui répond. 





The number of possible outcomes with 8 games 
20030221 

Gianni pose la question : If 8 basketball games being played(no ties), which means a total of 16 teams, what are the total number of possible outcomes that can occur. Penny Nom lui répond. 





6 digit numbers from 0,0,2,2,4,4 
20030123 

Amanda pose la question : How many 6 digit numbers can you make from the numbers 0,0,2,2,4,4, giving that 0 cannot come first. The number has to contain 2 twos, 2 fours, and 2 zeros. Penny Nom and Claude Tardif lui répond. 





A penny, a nickel, a dime, a quarter, and a loonie 
20030121 

Blaine pose la question : I have 5 coins: a penny, a nickel, a dime, a quarter, and a loonie. How many different amounts of money could I pay using any combination of these coins? Penny Nom lui répond. 





Combinations of 1,2,3,...,10 
20021127 

Gord pose la question : If I had the numbers from 110 how many different combinations would i have.....would it be 100....since that is 10 squared. Penny Nom lui répond. 





The horse race 
20021119 

Pat pose la question : The Horse Race Three horses run a race. In how many different ways can the three horses finish the race if ties are allowed? Penny Nom lui répond. 





Chisanbop 
20021107 

Paul pose la question : I'm trying to find the book/books that explain this system? I have one small book that explains the very beginning of the system, but covers only about 10 to 20%. I'v tried several book sellers and have had no luck. Diane Hanson lui répond. 





How many empty seats are there? 
20021029 

Ronnie pose la question : Three new students arrived in class. Teacher says there are 210 ways you can set. How many empty seats are there in the classroom? After new student are assigned seats, how many empty seats will remain? Penny Nom lui répond. 





Tree diagrams 
20021012 

Denean pose la question :
 For lunch, students can choose juice or milk; hamburger or pizza; and a banana or apple. How many lunch combinations can the students make?
 In an experiment, Monty can use paper towels or cloth. He can choose red, green, or yellow food coloring. How many combinations are there?
Penny Nom lui répond. 





How many dominoes? 
20020913 

A student pose la question : Dominoes are split into two halves. If you were allowed up to 6 dots on each half, how many options of dominoes could you get? Penny Nom lui répond. 





Social security numbers 
20020906 

Chris pose la question : How many different number combinations are there for the social security system? We know that there are only a certain ammount of combinations available and the current US population is at 281 million. The number system should include as many nine digit combinations as possible using the numbers 09 in multiple different spots. Penny Nom lui répond. 





Parallelograms 
20020821 

Moorthy pose la question : 11 parallel lines are intersected by another 9 parallel lines.Then how many parallelograms are formed? Walter Whiteley lui répond. 





Combination locks 
20020817 

John pose la question : How many combinations of three number codes can occur with a standard combination lock? The range of possible numbers is 039 which allows 40 different possible choices each turn of the dial. Each combination requires exactly three numbers (i.e. three turns of the dial). E.g. 35405. Allow for reuse of the same number three times e.g.101010. I don't think there is any preference shown for certain number combinations. Can you explain how the total is derived? Someone at the YMCA this week put this question to me and I gave an answer but I am not sure I am rightso I have come to you. Penny Nom lui répond. 





Musical Scales 
20020724 

Terence pose la question : Given that there are 12 notes in a musical octave, what is the maximum number of musical scales possible within that octave, if each scale has a minimum of 5 notes and a maximum of 9 and we start all the scales from the same note? In case you don't know anything about music, a scale is a progression of notes where you start on a specific note and end on that same note an octave higher. There are twelve different notes between these two similar notes. Which notes you choose to play determine the sound of the scale. Anything less than five notes would not make for a very interesting scale. Anything more than nine and you would be playing almost 'every' note in the scale, not leaving much room for distinction in how you organize these notes. I assume you first have to figure out the maximum number of variations possible in a 5note scale (with 12 notes at your disposal). Then do the same for a 6note scale, then a 7note, then an 8note, and so on. Then add up the results. How to find this maximum number of variations for each scale size though is what I don't know. Leeanne Boehm lui répond. 





Counting 
20020621 

Rachel pose la question : How many different numbers of 2 different digits each can be formed using the digits (1,3,5,7,9)?
How many triangles are formed by the vertical of a regular hexagon? Penny Nom lui répond. 





A popular television game show 
20020519 

Amrita pose la question : On a popular television game show, contestant must first answer a question by placing 4 given events in ascending or desending order in the quickest time. (a) if a contestant does not know how any of the events should be arranged, how many different ways could the question be answered?
Answer: 4!= 24 (b)a contestant has to arrange the events that correspond to A, B, C, and D. one contestant is positive that event D follows directly after avent B, but does not know about the other s. how many different ways could this contestant arrange the letters A, B, C, and D, list the possibility
Answer: which I didn't get Penny Nom lui répond. 





A ski trip 
20020510 

Navi pose la question : A ski trip at the school has been arranged. there are 30 students that have paid for the trip and 6 parents that have volunteered to chaperone. to transport the students and parents easily, they are to be divided into two group. one group has 10 students and 2 parents, and the other group has 20 students and 4 parents. (a) How many different group of 10 students can be formed? ANSWER:
(b) How many different groups consistinmg of 10 students and 2 parents are possible? ANSWER:
(c) kelly is one of the students going on the ski trip, and kelly's mother volunteered to be one of the chaperones. kelly's mother would prefer to be in the smaller group and not in the same group as kelly. if this wish is honoured, how many ways can the smaller group and its chaperones be chosen? ANSWER: Harley Weston lui répond. 





Designing a ballot 
20020426 

Kelley pose la question : I want to design a ballot for four elections. Actually all the candidate races are on 1 ballot. I need to know how many different ballot styles would be needed for all of the candidates to be in each rotation an equal number of times. For example:  A,B,C & D are running for mayor
 E,F,G & H are running for congress
 I,J & K are running for senate
 L,M & N are running for governor
They are all on the same ballot. But in each race their name (for instance A) has to be in the #1 rotation, #2 rotation, #3 rotation, and #4 rotation for his race on this ballot an equal number of times as B,C and D. The same goes for the other candidates for their perspective races. How many total ballot styles will there be? Penny Nom lui répond. 





How many different account numbers are possible? 
20020418 

Andrene pose la question : how many different account numbers are possible if the account numbers consist of a letter of the alphabet, followed by five numerical digits, and followed by another letter. Penny Nom lui répond. 





450 students 
20011219 

Jessie pose la question : My teacher told me that the number of ways of lining up the 450 students in our school is larger than the number of atoms in the universe. Is this right? This question came to Good Question, a regular feature on the CBC Morning Edition radio show in Saskatchewan. Denis Hanson and Harley Weston lui répond. 





A health club 
20011125 

Maria pose la question : A health club with a membership of 650 people operates a running track and an indoor swimming pool. A survey of the membership indicates that 68% use the running track, 44% use the swimming pool, and 8% use neither. If a member is chosen at random, what is the prbability that the member uses: a) Both the track and the pool? b) Only the track? Penny Nom lui répond. 





Counting CD's 
20011106 

Jason pose la question : An older brother said to his younger brother, "Give me 8 of your CDs, then I will have twice as many as you." The younger brother replied, "No, you give me 8 of yours instead, and then we'll have an equal number." How many CDs does each boy have? Chris Fisher lui répond. 





Free pamphlets 
20011024 

Salman pose la question : a travel agency has limited number of six different free pamphlets about the beetle islands. the agent tells you to take any that you want, but not more than two of any kind. Assuming that you take at least one pamphlet, how many choices could you make Penny Nom lui répond. 





Danging couples 
20010606 

Danielle pose la question : How many boygirl dancing couples could be formed if 85 boys and 102 girls attend a school dance? Penny Nom lui répond. 





Four digit numbers from 1,2,3,4,5,6,7,8 
20010531 

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. 





A 6 character field 
20010516 

A parent pose la question : I have a 6 character field that can use any combination of alphanumeric characters (AZ, 09). How many total combinations are possible? Penny Nom lui répond. 





Dominos 
20010428 

Mark pose la question : A standard dominoe set consists of 28 pieces, from doublezero to doublesix  Is it possible to arrange all those pieces in a straight line in such a way that the dots of any pair of adjacent pieces match? Please include picture
 Is it possible to arrange them in a circle and still meet the conditions in 1?
Claude Tardif lui répond. 





Choosing a car 
20010428 

Ashley pose la question : THE CAR DEALERSHIP IN TOWN OFFERS 32 DIFFERENT MODELS OF VIHICLES.EACH MODEL HAS A CHOICE OF EIGHT INTERIOR COLORS,EIGHT EXTERIOR COLORS,AND ALSO THE OPTION OF AUTOMATIC OR MANUAL TRANSMISSION. HOW MANY COMBINATIONS ARE POSSIBLE? Penny Nom and Andrei Volodin lui répond. 





Four crayons 
20010110 

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. 





5 spades 
20001121 

Matt pose la question : In a standard deck of 52 card how many would you have to draw (without looking at them) to be absolutely certain that you had 5 spades? Claude Tardif lui répond. 





Permutations vs. combinations 
20001120 

Ashleigh pose la question : How do you tell whether the problem is a permutation or a combination? Walter Whiteley lui répond. 





Two problems 
20001102 

Michael pose la question : Question: I mistakenly divided a number by 5 when I should have multiplied by 5. FInd my percent of error. Next Question: How many odd numbers are between 10 and 9,999 from the digits 09 if each digit is used once per number. Penny Nom lui répond. 





Tapes and CD's 
20001022 

Arnold pose la question : Nicole has 25 CDs and tapes altogether. When she tries to pair them up, she has 4 CDs left over. How many tapes does Nicole have? Penny Nom lui répond. 





Probability of a square 
20000918 

Nick pose la question : What is the probability that four different points chosen at random from the fifteen equallyspaced points shown are the vertices of a square? I need to have my answer expressed as a common fraction. Help! I don't know how to write it. . . . . . . . . . . . . . . . Penny Nom lui répond. 





10,000! 
20000721 

Lauren pose la question : Hi I was just wondering if you could tell me how many zeros are in 100,000! (factorial.) Denis Hanson lui répond. 





Six letter words 
20000515 

Karl Freitag pose la question : An anthroplogist discovers an isolated tribe whose written alphabet contains only six letters (call the letters A,B,C,D,E, and F). The tribe has a taboo against using the same letter twice in the same word. It is never done. If each different sequence of letters constitutes a different word in the language, what is the maximum number of sixletter words that the language can employ? Penny Nom lui répond. 





Paying with silver 
20000426 

Luther Jackson pose la question : A silver prospector is unable to pay his March rent in advance. He owned a bar of pure silver, 31 inches long, so he made the following arrangement with his landlady. He would cut the bar, he said into smaller pieces. On the first day of March he would give her and inch of the bar, and on each succeeding day he would add another inch to her amount of silver. She would keep this silver as security. At the end of the month, when the prospector expected to be able to pay his rent in full, she would return the pieces to him. . . . Claude Tardif and Penny Nom lui répond. 





Question regarding Combinations and permutations 
20000419 

Paul Stoner pose la question : I am a programmer and I have a quick question. I have 5 criteria which will either be true or false. If a criterion is true it returns its ordinal representation, if false it returns 0. I then combine these results to determine where to go in my program. My question is: How can I figure out the number of combinations I will need? Patrick Maidorn lui répond. 





Hats, jackets and gloves 
20000330 

Max pose la question : Find the one that does not belong 66 333 99 111 88 also if you have 3 hats and 3 jackets and 3 gloves, how many different combinations of a hat and a jacket and gloves can you wear? Claude Tardif and Penny Nom lui répond. 





Six digit numbers using 1,2,5,6,7, and 9 
20000320 

Rachel pose la question : How many different sixdigit numbers can you make using the digits 1,2,5,6,7, and 9? How many of these six digit numbers are divisible by six? Claude Tardif and Denis Hanson lui répond. 





Party favors 
20000222 

Krystina Fernandez pose la question : Luanne was making party favors for her little sister's birthday party. Each party favor was in the shape of a cube. Luanne had pink and purple paint to paint the cubes and she could paint each face only solid pink or solid purple (no dots,stripes,ect.).For example, one cube may be all purple, another may have two purple faces and four pink faces. Her little sister wanted to have a different cube for each guest.(A cube is not considered different if it can be turned so that all it's sides match the corresponding sides of another cube.)How many different cubes was it possible for Luanne to make? Claude Tardif lui répond. 





Change for a dollar 
20000216 

Rachelle pose la question : What is the least positive number of coins that is impossible to give out change for a dollar? It is higher than 50 i know and you can us dimes, nickels, pennies, quarters, 50 cent pieaces and silver dollars. Claude Tardif lui répond. 





Ten stools 
20000206 

Haim pose la question : In a cafe with ten stools, three customers want to be seated, so that no two are next to each other. How many ways can this be done? Do not consider it to be a separate seating if two customers switch seats. Denis Hanson and Walter Whiteley lui répond. 





Phone Number Possibilities 
20000109 

Hamilton Weston pose la question : How do phone companies arrive at the possible number of phone numbers that can be generated for customers? Harley Weston lui répond. 





Going to the movies 
19991021 

Gayla Werry pose la question : You have $1.00 to take 100 people to the movies. It costs: 1 cent for 10 children, 3 cents for each woman, 5 cents for each man. You have to take at least one of each category of people. Your answer has to add up to exactly 100 people and exactly $1.00. How many men, women, and children can you take? Penny Nom lui répond. 





How many squares are on a chessboard? 
19991020 

Tchilco pose la question : How many squares are on a chessboard? Penny Nom and Claude Tardif lui répond. 





towers of cubes 
19991005 

Sanker pose la question : I need help to solve this Rules for bulding towers of cubes rule 1  The number of cubes on the bottom layer is always one less than the number of squares on the grid  rule 2  Each new layer is made with one cube less than the layer underneath it.   Investigate how many different arrangements there are of 4 cubes on top of 5 cubes on a two by three grid
 investigate the number of different arrangements of six cubes on top of seven cubes on a two by four grid
 investigate the relation between the number of arrangements of cubes and the size of the grid
 when there are two layers of cubes
 when there are more than two layers of cubes
Walter Whiteley lui répond. 





Numbers with the digit 2 in 1...1000 
19990920 

Jessica pose la question : Is there a trick to finding out how many numbers containing the digit two is there from 1 to 1000? Walter Whiteley lui répond. 





Dividing a Circle 
19990412 

Mike Kenedy pose la question : I am having trouble with a homework question for bonus marks. A Circle is continually divided by lines that do not intersect the center so that they produce the most pieces of circle. For example  1 line divides the circle into 2.
 2 into 4.
 3, however into 7.
 4 into11
 5 into 16
 6 into 22
 7 into 29
 8 into 37
 etc...
I am stumped and cannot figure out the equation, though I'm sure it involves squares. Can you help? Penny Nom lui répond. 





Four Corners Maths Problem 
19990216 

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, 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, 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 
19990209 

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 sixtyseven). 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. 





Money and Counting 
19990203 

Deborah Goodman pose la question : I am looking for ways to tutor my daughter in money counting and handwriting skills. Jack LeSage lui répond. 





A handshake problem 
19990105 

Nick Lam pose la question : There are 40 people at a party. 1 host couple, a mom and her daughter. There are 19 other guest couples, composed of moms and their daughters. The Host couple shakes hands with everyone except each other. Each guest mom shakes hands with everyone but their own daughter. Each guest daughter shakes hands with everyone except their own mom. A hand shake between two people is considered to be one handshake. HOW MANY HANDSHAKES ARE THERE? Penny Nom lui répond. 





Three dice 
19981117 

Ryan Allinson pose la question : Rolling three regular dice how many different ways could a sum of 10 be rolled? Hope you can help. Can you please show me how this is done? Penny Nom lui répond. 





Social Security Numbers 
19980707 

Valerie Lucas pose la question : How many social security numbers are possible? the answer is 10^9 why isn't the answer 9^9? Harley Weston lui répond. 





The Birthday Problem 
19980612 

Josh Skolnick pose la question : if you are at a party what is the least amount of people that have to be there to have at least a 50% chance of having 2 people with the same birthday? and how do you get the answer thank you in advance josh Harley Weston lui répond. 





Using your fingers 
19980421 

Ian Sutherland pose la question : My 7yearold son, in Grade 2, constantly uses his fingers to count. I know for now this is a useful crutch but at what point should he stop? Diane Hanson lui répond. 





A Finite Math Question. 
19970907 

Angela L. pose la question : How many threedigit numbers can be formed using only the numbers 1 to 7 if the number 2 must be included? Penny Nom lui répond. 

