Twelve is the first number with two pairs of factors (2 x 6 and 3 x 4). Primes, on the other hand, have no pairs of factors other than the trivial pair of one and the prime number itself. Considering that contrast, here’s an interesting fact about primes and the number 12. Add 12 to […]
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Math problem that deals with the hands of a clock.
How to quickly multiply by 25. This is a fun math trick that anyone can learn in 5 minutes or less.
Turtle Talk January 2010. Discussion on how to help students understand mistakes they make in algebra. Problem of the Month on test scores.