Ten bets that you're guaranteed never to lose after watching this video

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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