Archive | Problem of the Month

Problem of the Month – January 2013

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 [...]


November 2008 Problem of the Month: finding an alternative way to represent a number using nothing more than a few candles. Use number theory and flexible thinking to find a way to show the number. There’s a prize for the person who answers most quickly.