Teaching a university course for the first time: any tips or suggestions? [more inside]
posted on Dec 12, 2007 - 33 answers

Where am I going wrong with this (very simple) implicit derivative? [more inside]
posted on Nov 3, 2007 - 3 answers

Why is it that when I solve the inequality 0 ≤ arccos(x) <> cos(π/4)? Why do the operators switch direction? [more inside]
posted on Oct 19, 2007 - 11 answers

is there a book on the mathematics of chess? [more inside]
posted on Oct 18, 2007 - 6 answers

ABC x D = BADC. What single numbers (1-9) do the letters represent? Is there any way to arrive at the answer (a) by logical deduction all the way rather than with some trial-and-error and (b) so that a 10-year-old can follow the logic? [more inside]
posted on Sep 16, 2007 - 15 answers

(x + y)-(x*y)=79. What are x and y? [more inside]
posted on Jun 4, 2007 - 17 answers

My maths skills are rubbish. Help me understand modulus remainders [more inside]
posted on Aug 8, 2006 - 10 answers

Is there a mathematical technique for simplifying ratios/fractions? [more inside]
posted on Dec 17, 2005 - 21 answers

A crystal consists of 100,000,000 layers of atoms such that there is 1 atom in the first layer, 3 in the second, 6 in the third, 10 in the fourth, 15 in the fifth, and so forth. Exactly how many atoms are there in the entire crystal? [more inside]
posted on Oct 8, 2005 - 8 answers

I am trying to find some good interactive Maths tutorial software which goes from basic algebra through to Differential Equations and maybe beyond. Can anyone recommend anything with the emphasis on the interactive side - something which can keep me interested so nothing too dry - a nice colorful multimedia approach would be ideal.
posted on Jun 12, 2005 - 2 answers

How can a major key sound confident and happy, while a minor key can sound sinister or sad? Is it just centuries of musical brainwashing, or is there a real mathematical explanation?
posted on May 7, 2004 - 16 answers

I'd like to learn Math. I'm particularly interested in learning trig and calculus. I'm don't need to learn these disciplines for any purpose. I'm just interested. I'm a reasonably bright guy, with a logical mind (I've worked as a programmer), and I'm a good self-learner. I'm not in a rush (don't mind working at this for a few years). What books/resources would you recommend? I should probably go all the way back to Algebra, which is pretty much where I left off in High School years ago.
posted on Dec 27, 2003 - 12 answers