After watching this video, you'll always be able to outwit your friends if you ever feel the need to challenge them to a wager. (That is unless they've seen this video as well).

Quirkology's Richard Wiseman has come up with 10 bets that are seemingly impossible but actually have incredibly easy solutions - so long as you know what they are.

From identifying an empty battery from a pair, to picking up a handful of matches using only one other match, here are 10 that could be worth bearing in mind for future:

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