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	GCD		2013-05-20
		Julia pose la question : Prove that if a and b are coprime integers, the greatest common divisor of a + b and a - b is either 1 or 2. Penny Nom lui répond.
	Inverse trig functions		2013-05-19
		ky pose la question : hello, so iv'e been asked to draw a triangle with sides of 3, 4, and 5. And find the measure of all three angle using sin-1, cos-1, tan-1. I got really confuse, I'm taking the SAT pretty soon and it would be great to get this... THANX Penny Nom lui répond.
	The square footage of a 17 inch by 17 inch tile		2013-05-18
		Leroy pose la question : How do I calculate the square footage of a 17inch by 17 inch tile Penny Nom lui répond.
	(4- 4cos^4 x)/(sin^2 x)		2013-05-18
		Agnes pose la question : How I can solve this question : Simplify (4- 4cos^4 x)/(sin^2 x) and write in terms of sin x Penny Nom lui répond.
	r=10cos(t) in cylindrical coordinates		2013-05-18
		r.m pose la question : question from calculus exam: what is the figure obtained having eqn.r=10cos(t) in cylinderical coordinates? i know it is a cylinder with center (5,0) ,but can't the equation represent two cylinders ,one with center (5,0) and the other with center (-5,0). thanks for any help. Penny Nom lui répond.
	Inverting fractions and percentage		2013-05-18
		Carlos pose la question : If I calculate the percentage change between two fractions, say, 1/100 and 2/100, I get 100% change. Now, if I flip denominator and numerator, 100/1 and 100/2, and repeat the calculation, I get a 50% change. Why are the percentages different? Thank you very much Penny Nom lui répond.
	The percentage of fat in a container of yogurt		2013-05-17
		Katy pose la question : There is a question that I' having trouble with. It says: "A container of yogurt contains 228 g of water, 54 g of carbohydrates, 12 g of protein and 6 g of fat, what percentage of the yogurt is fat?" How do you convert 6 g into percentage? Penny Nom lui répond.
	Cutting three sections of pipe		2013-05-16
		Michael pose la question : A plumber cuts three sections of pipe from a 12’ length of ABS pipe, the lengths of the sections are 33 3/8”, 56 5/8” and 39 7/8”. What is left over from the full length, if the saw cut is 1/8” wide? Penny Nom lui répond.
	8 3/4 as a decimal		2013-05-15
		Luisa pose la question : How to make 8 3/4 into a decimal Penny Nom lui répond.
	HCF and LCM		2013-05-15
		Kelly pose la question : If HCF and LCM of two numbers is 7 and 20 respectively, then the number/s is/are…. 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 circle and a chord		2013-05-14
		yashvardhan pose la question : A circle which radius 13cm. Find the length of the chord which is 5 cm away from center Penny Nom lui répond.
	An equation in two variables		2013-05-14
		Steve pose la question : Verify solutions to an equation in two variables. 4x-2y=8 (3, 2) Penny Nom lui répond.
	Dice		2013-05-14
		Julia pose la question : What is the probability of rolling(as many times as necessary) a die and getting a total number(sum) when all the rolls are added together of 11? Lorraine Dame lui répond.
	A 2-digit number		2013-05-13
		A teacher pose la question : Find a “2-digit number” where the sum of the 1st digit (on the Left) and the square of the 2nd digit equal the same number. Lorraine Dame, Harley Weston lui répond.

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