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	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.
	Simplify		2009-09-04
		Sarah pose la question : How do you simplify: (x-4)^3? Robert Dawson lui répond.
	Airline overbooking		2009-09-03
		Nikita pose la question : An airline company knows that 8% of it's passengers will not show up for their scheduled flights. A plane has 175 seats. a) What is the probability that 10 passengers or fewer will not show up? b) What is the probability that 10 to15 passengers will not show up? c)What is the probability that exactly 10 passengers will not show up? d) What is the probability that more than 19 passengers will not show up? Robert Dawson lui répond.
	Nickels and dimes		2009-09-03
		MATTHEW pose la question : mike has 3 times as many nickels as Larry has dimes. Mike has 45 cents more than Larry. How much money does Mike have? Penny Nom lui répond.
	A 30% markup		2009-09-02
		Lisa pose la question : Ok i want to mark a products up 30%, I would take 5.00X3o%,but my boss does it another way I have yet to figure out he takes cost divided by 70% or something like that I am so lost can you help? PLEASE Victoria West and Penny Nom lui répond.
	Show your work		2009-09-02
		Gerald pose la question : We have a 6th grade student who can solve math problem successfully without showing her work. The teacher thinks it is not fair that she doesn't show her work and the other have to and do. What sort of classroom accommodation(s) would you recommend for this type of student. It would seem to be a popular problem since there are many student who think more global than sequential. Victoria West, Penny Nom and Robert Dawson lui répond.
	Normal Distribution		2009-09-02
		Nikita pose la question : Scores on a college exam are known to be normally distributed with a standard deviation of 20. If the top 3% have scores in excess of 200, what is the mean score? Robert Dawson lui répond.
	The intersection of two graphs		2009-09-02
		Jaqueline pose la question : Find the points of intersection of the graphs of the equations x^(2 )+ y^2=25 and 2x + y = 10 Penny Nom lui répond.
	Is -100 degree angle an acute angle?		2009-09-02
		Nazrul pose la question : Is -100 degree angle an acute angle? Please explain. Here -100<90. Robert Dawson lui répond.
	Price increases and decreases		2009-09-02
		craig pose la question : I work for an industry that bases it price increases and decreases on commodity pricing - Customer get confused on how/why we calculated new prices due to movement in the market - Price go up x% for every $10 of movement in the market - For this example- Movement went down by $30 and it is 2% for every $10 - so price decrease was 6%. Customer's price is currently $100. We say - $100/1.06= new price of $94.3 Customer says - $100*.94= new price of $94. They don't understand that if board went back up $30 which would be 6% increase, they wouldn't be back at $100 if they multiplied on the price decrease. $94*1.06=$99.64 vs. $94.3*1.06=$100 (Back to the original price) What is the best way to explain to customer besides using this example? Any help or info is appreciated. Craig Victoria West lui répond.
	Nickels, dimes and quarters		2009-09-02
		danielle pose la question : In changing a $5 bill, Sarah received nine more dimes than nickles and seven fewer quarters than dimes. How many coins of each type did she receive? Penny Nom lui répond.
	Zero Angle		2009-09-01
		Nazrul pose la question : Is zero degree an acute angle? Please explain. Janice Cotcher lui répond.
	Arithmetic Sum & Sequence		2009-09-01
		Alice pose la question : Find the 24th term of this sequence 6.8,8.0,9.2... Find the sum of the first 21 terms Janice Cotcher lui répond.
	What is 8 tons in exponential form?		2009-09-01
		Tyler pose la question : what is 8 tons in exponential form Penny Nom lui répond.
	Cardinality of infinite sets		2009-09-01
		Brian pose la question : I was reading an answer to a question on your site regarding infinite sets (http://mathcentral.uregina.ca/QQ/database/QQ.09.01/carlos1.html), and I think they may have got the answer wrong. I his example, he claims that the set of real numbers BETWEEN 0 AND 1 is larger than the set of positive integers. Please correct me if I am wrong, but I believe those two sets are -- pardon the expression -- equally infinite. For any integer, there is a corresponding real number between 0 and 1, and vice versa. For instance, using the decimal as a "mirror", you can create a mirror image of any real number between 0 and 1 as an integer (i.e. 0.1234 gets mirrored as the integer 4321 -- I could write it out algebraically, if you want, but you get my point) Am I wrong? Thanks, Brian Victoria West lui répond.

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