Our new maths topic is Multiples, Factors and Primes. Here is the important vocabulary you need to know for this topic.

• product – the result when two numbers are multiplied. For example,

  

• multiple – a multiple is a number multiplied. So 20, 30, 40 and 50 are multiples of 10.
• factor – a whole number that divides exactly into another whole number. A whole number that multiples with another number to make a third number. For example, the factors of 12 are 1, 2, 3, 4, 6, 12. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36.
• prime number – a number that has exactly two factors (itself and one). Note: one is not a prime number: it only has one factor (1), not two.
• composite numbers – a number with more than two factors.

Please play the games below to practise your knowledge and understanding of multiples, factors and primes.