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Have you signed up for a World Cup Sweepstake? Who cares about the football when there's a chance to win £32 pounds off your colleagues but what's the best strategy? When should you drop your pound in the hat? Matt Parker, a London Mathematical Society's Popular Lecturer and Maths Fellow at Queen Mary University of London spoke to 5 live about sweepstake tactics and odds.

This clip is originally from Breakfast 10 June.