He charmed us on University Challenge and in Monkman & Seagull’s Genius Guide to Britain, and regularly jolts our brains into action with puzzles on BBC Radio 4's Today. Now Bobby Seagull shows us that numbers are the keys that unlock the randomness of football results, the beauty of art and the best way to get things done. Maths makes life better!

Throughout April, tickets for under 16s are £5.

Under 12s must be accompanied by a ticket-holding adult.

Bobby's puzzle (answer to be revealed at the Festival):

You put up the words BOOK SALE on a banner at the ChipLitFest, with 1 A4 card for each letter. Unfortunately, the word BOOK drops on the floor. Without looking, what is the probability of picking up the letters in the word BOOK in the correct order?