Hosted by Rick Edwards, Impossible is the quiz with the third dimension: as well as right answers and wrong answers there are also Impossible answers - they are not just wrong, they couldn't possibly be right.

A cast of 30 returning players compete for the chance to win £10,000. Every right answer takes them a step closer to a shot at that jackpot - but a single Impossible answer will knock them out for the day. They'll have to try again tomorrow.

The winner claims a daily prize of up to £1,500, and faces one final question. There are three correct answers - and if they can find them all, they will trigger a dramatic cascade of 10,000 pound coins. But if any of their answers are Impossible, they lose the daily prize and win nothing.

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Impossible