Start with a deck of cards. Before the trick, sneak a peek at the 10th card in the deck. Memorize it. Ask your volunteer to add the first and second digit of their number together. For instance, if he ...

If there's one subject a lot of people really disliked at school (aside from P.E.) it was maths. Trying to work out all those equations, fractions and percentages gave me a stonking headache and I'm ...