Richard Wiseman is a wonderful psychologist and he always publishes these cool puzzles.
On Friday I posted this puzzle. This triangle is constructed from 10 coins. What is the smallest number of coins that need to be moved to make the triangle point downwards?
If you have not tried to solve it, have a go now. For everyone else the answer is after the break.
The answer is…..three!
Did you solve it? Any other answers?
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