I can recognise and find factor pairs
Some numbers only have the number 1 and itself as a factor. These are called Prime Numbers. The following numbers are prime because they can only be divided by 1 and itself. Can you find the next 5 prime numbers?
1, 2, 3, 5, ____, _____, _____, _____, _____.
Why wasn't the number 4 in the list above?