The number 4 is a symbol of balance and stability: tables and chairs have four legs, as do most animals, and humans have four limbs. We also like to divide things up into fours – four parts of the day, four points on a compass and four seasons for example. And then there’s the four horsemen of the apocalypse, wreaking havoc and causing death and destruction everywhere they tread. Maybe four isn’t so stable after all…

You can listen to all of the Funbers episodes from BBC Radio Cambridgeshire and BBC Radio Oxford here.