Everyone's happy! Even numbers can always be split equally between two and always end in a 0, 2 ,4, 6 or 8. But if we take this bunch of odd bananas, our furry friend has one less and is going ape!

For example, these 4 cubes can be shared into two equal groups of 2 cubes. So 4 is an even number. An odd number cannot be shared equally into two groups. For example, these 3 cubes cannot be ...