







Grade nine problem solving 
19960311 

Azmat Hussain pose la question : Can math problems be actually fun and engaging? Diane Hanson lui répond. 





A trig identity 
19960311 

Azmat Hussain pose la question : Is there an easier/another way to prove the trig identity cos(a+b) = cos(a)cos(b)sin(a)sin(b)? Penny Nom lui répond. 





Pronunciation 
19960305 

Todd Stienhauser pose la question : Is 123.4 pronounced "one hundred and twenty three and four tenths"or "one hundred twenty three and four tenths"? Penny Nom lui répond. 





Exponents 
19960225 

Eric Cote pose la question : I want to know why the grade six math books tell you that the little number at the top right of another number (exponent) is called the power, but the grade seven and up books tell you it's called the exponent? Harley Weston lui répond. 





Algorithms for roots 
19960222 

Charles Hewitt pose la question : I have seen an algorithm for finding the square root of numbers. Are there similar such algorithms for higher roots? Harley Weston lui répond. 





Prime numbers 
19960222 

Charles Hewitt pose la question : I would apprecaite it if you could share with me any algorithm to determine whether a number is prime. Penny Nom lui répond. 





Queue length 
19960222 

Frank Fronhofer II pose la question : How long is the toll booth queue? Harley Weston lui répond. 





e^(i*pi) = 1 
19960219 

Matt Schneider pose la question : Why is e^(i*pi) = 1? Harley Weston lui répond. 





Pascal's Triangle 
19960219 

Richard pose la question : Do you know of any resources that might help us make use of the numeric relationships in Pascal's triangle on a fairly simple basis? Denis Hanson lui répond. 





Neighbourhoods 
19960214 

Robert pose la question : What are neighbourhoods? Harley Weston lui répond. 





Euclid's Pythagorean proof 
19960214 

Sean pose la question : What is Euclid's proof of Pythagoras' theorem? Harley Weston lui répond. 





Stairs 
19960212 

Marianne and Carrie pose la question : How many ways can you run up a flight of stairs? Denis Hanson lui répond. 





What is the variance of the difference of two binomials? 
19960208 

Chris Johnson pose la question : My coworkers and I have come up with different estimates of the zstatistic, and are in particular disagreement over the calculation of Variance for this problem. I am trying to find out, with a five percent level of significance, whether the new form yields a higher rate of return than the old form. Any thoughts, comments, or solutions? Harley Weston lui répond. 





Converting to other bases 
19960206 

Paul pose la question : Converting base 10 numbers to other bases Penny Nom lui répond. 





Number of factors 
19960130 

Chrissy pose la question : What number has exactly 13 positive factors? Penny Nom lui répond. 

