A prime number is a number with exactly two factors. Prime numbers are only divisible by 1 and itself. Another way to think of prime numbers is that they are only ever found as answers in their ...

Quiz: Multiples and factors This interactive quiz is suitable for GCSE maths students studying multiples and factors, prime, square and cube numbers, powers and roots, and highest common factor.

Who remembers the joy of revising for GCSE exams? It might have been a few ... Work out 10 x (3 + 5) 4. Write down a prime number that is between 20 and 30 5. Find a number that is exactly half ...