Prime numbers are those that can be divided cleanly only by themselves and by 1. The first primes are 2, 3, 5, 7, 11, 13, 17, 19, and 23. Prime numbers are where imaginary mathematics begins. They are ...

Save guides, add subjects and pick up where you left off with your BBC account. The questions in this quiz are suitable for GCSE maths students studying multiples and factors, prime, square and ...