A prime number is an integer, or whole number, that has only two factors — 1 and itself. Put another way, a prime number can be divided evenly only by 1 and by itself. Prime numbers also must be ...

HYPATIA:Looking for me? Welcome to the desert of factors, multiples and primes. One of my favourite parts of my mathematical maze. If you are going to find your way out, you are going to have to work ...

How to work out which numbers are multiples of three. A class is asked to find a number from a range between 750 and 800 which is a multiple of three. There is also a demonstration of how to find even ...