There is a solution to this puzzle but it is only available to teachers who have subscribed to Class Admin.
This puzzle provides pupils with practice recognising prime numbers. If pupils have access to a calculator they may need to devise a procedure for checking whether a number is prime or not. It is expected that the pupils doing this activity will begin to recognise the first 25 prime numbers represented here. It's probably a good idea to do the Prime Numbers Jigsaw before attempting this activity.