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Quandaries & Queries
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 Euclid's Pythagorean proof 1996-02-14 From Sean:What is Euclid's proof of Pythagoras' theorem?Answered by Harley Weston. Stairs 1996-02-12 From Marianne and Carrie:How many ways can you run up a flight of stairs?Answered by Denis Hanson. What is the variance of the difference of two binomials? 1996-02-08 From Chris Johnson:My co-workers and I have come up with different estimates of the z-statistic, 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?Answered by Harley Weston. Converting to other bases 1996-02-06 From Paul:Converting base 10 numbers to other basesAnswered by Penny Nom. Number of factors 1996-01-30 From Chrissy:What number has exactly 13 positive factors?Answered by Penny Nom. Trig identities 1995-11-30 From Azmat:Why do we work on the two sides of a trig identity separately?Answered by Harley Weston. (-3)x(-2) 1995-10-25 From Azmat:Why is (-3)x(-2) = 6?Answered by Herley Weston and Ed Giesbrecht. Complex numbers 1995-10-22 From Jacquie:Why should we teach complex numbers in high school?Answered by Harley Weston. Magic Square 1995-10-20 From Marianne and Carrie:How can an 8 by 8 square have the same area as a 5 by 13 rectangle?Answered by Denis Hanson. What is the golden section? 1995-09-17 From Cindy:What is the golden section of a line?Answered by Denis Hanson.

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