These chaps, the ones, are the smallest numbers. They go from 1 to 9 but then you run out of numbers. Ah, don't worry little fella. We just need some help from the big guys. Place value helps us ...

19 is a prime number. It can only be divided by 1 and 19. 9 is not a prime number. It can be divided by 3 as well as 1 and 9. Looking for even more resources to help engage students in your maths ...