Why not also check out this Bitesize Primary animation and interactive activity on odd and even numbers? KS1 Maths: Number Bonds with Martin Dougan. videoKS1 Maths: Number Bonds with Martin Dougan ...

So 4 is an even number. An odd number cannot be shared equally into two groups. For example, these 3 cubes cannot be shared into two equal groups. You have a group of 2 cubes and a group with 1 cube.