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! That's because ...

Weird But True: Honeybees Can Learn the Difference Between Even and Odd Numbers. They’re the first non-humans to exhibit this ability, indicating that you don’t need a brain cortex to do it.