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	Matrice		2006-02-01
		Kader pose la question : mon probleme est le suivant soit deux matrices carrees A et B d'ordre n qui sont anticommutatives AB= -BA , demontrer que au moins une des deux matrices n'est pas inversible si n est impair. je n'arrive pas a utiliser le fait que n soit impair, trouver le rapport entre n impair et inverse des matrices, je pars sur la base de DETAB=DETA*DETB Claude Tardif lui répond.
	probleme de matrice		2006-02-01
		Un eleve pose la question : mon probleme est le suivant soit deux matrices carrees A et B d'ordre n qui sont anticommutatives AB= -BA , demontrer que au moins une des deux matrices n'est pas inversible si n est impair. Claude Tardif lui répond.
	The box of maximum volume		2006-02-01
		Elizabeth pose la question : A box factory has a large stack of unused rectangular cardboard sheets with the dimensions of 26 cm length and 20 cm width. The question was to figure what size squares to remove from each corner to create the box with the largest volume. I began by using a piece of graph paper and taking squares out. I knew that the formula L X W X H would give me volume. After trial and error of trying different sizes I found that a 4cm X 4cm square was the largest amount you can take out to get the largest volume. My question for you is two parts First: Why does L X H X W work? And second, is their a formula that one could use, knowing the length and width of a piece of any material to find out what the largest possible volume it can hold is without just trying a bunch of different numbers until you get it. If there is, can you explain how and why it works. Penny Nom lui répond.
	The sum of two numbers is 21.		2006-01-31
		Dan pose la question : The sum of two numbers is 21. One number is three less than the other. Find the numbers Penny Nom lui répond.
	What is 3.5% of 4000.00?		2006-01-31
		Ellen pose la question : What is 3.5% of 4000.00? What is 3.5% of 2000.00? Penny Nom lui répond.
	BEDMAS		2006-01-31
		Janielle pose la question : What Do All the Letters In BEDMAS Stand for? Penny lui répond.
	Arithmetic progressions		2006-01-31
		A student pose la question : 1)the sum to n terms of a particular series is given by Sn=17n-3n2 a)find an expression for the n term of the series b)show that the series is an arithmetic progression 2)a particular arithmetic progression has a positive common difference and is such that for any three adjacent terms ,three times the sum of their squares exceeds the square of their sum is 375.Find the common difference Penny Nom lui répond.
	Make 2 rows of 4 circles with only 6 circles		2006-01-31
		Sarah pose la question : Moving as many circles as you need, make 2 rows of 4 circles only having 6 circles? Chris Fisher lui répond.
	An array problem		2006-01-31
		Cynthia pose la question : Write a number sentence for this array........ It's a rectangle box 3 down and 4 wide. Penny Nom lui répond.
	Counting digits		2006-01-30
		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.
	Write the array for 3		2006-01-29
		Jamie pose la question : My son is a 5th grader and came home with a math question that I can't answer. The question stated - "Write the array for 3" I don't understand how this can be done with just one number. Penny Nom lui répond.
	Percentage increase in sound intensity		2006-01-29
		David pose la question : I am doing some emotion response mapping. Being a composer I know how to push the heart beat tempo by a % increase of BPM in my music. I want to know how to calculate an increase in intensity of sound. Now I have 60 decibels. I want an increase of intensity by a factor n% with out going over 156 decibels. Penny Nom lui répond.
	Cubic yards of dirt		2006-01-28
		Greg pose la question : How many yards of dirt do i need to cover an area of 1000 ft long, 20 ft wide and 3 inches deep Penny Nom lui répond.
	How much will each piece weigh?		2006-01-28
		Matt pose la question : How many equal pieces that weigh between 12 and 13 ounces can be made from 110 ounce block if the whole block is used? How much will each piece weigh? A paper square has area of 100 in2. Into how many pieces of equal area must the square be but if the area of each piece is to be between 8 in2 and 9 in2? What is area of piece? Penny Nom lui répond.
	Word problems		2006-01-27
		Duk pose la question : One kind of candy sells for 90cents more a pound than another kind. A pound of each sells for a total of $5.10. What is the selling price of each kind? A soft drink sells for 20 cents more than the deposit required on the bottle. The cost of the soft drink and the bottle deposit totals 70cents. How much is the soft drink? The bottle deposit? Penny Nom lui répond.

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