Six Coins

Take six coins and arrange them in a triangle as shown in the image. Your goal is to rearrange the coins into a hexagon with only four moves. Every move consists of sliding one coin to a new location where it touches at least two other coins.

The solution is shown below.

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  1. The problem is solved by moving two coins. If you do it in the correct order no sliding of the other coins is neccessy

        1. In the third step, if we slide the middle coin carefully, we can take it out, without rearranging the two coins on its left and right.