You should end up with a list of 25 prime numbers between 1 and 100. These are shown in the grid below.

You must have learnt about prime numbers in Class 4 or 5. Want to recall it? So, prime numbers are those numbers which are only divisible by 1 and themselves. They do not have any other factors ...

Save guides, add subjects and pick up where you left off with your BBC account. The only even prime number is \({2}\). All other even numbers are divisible by \({2}\). The number \({1}\) ...