As with most other mind puzzles and logical thinking exercises, this puzzle also seems very easy and simple, which is its main trick.

This is, as the authors claim, a very short test of your intelligence, but one thing separates it from the rest, and that is that this puzzle does not have just one, but two ways to solve it, and according to the authors, only one person in a thousand can solve both.

Are you the one in a thousand? Try it out for yourself and see:


First solution: 40

Second solution on next page

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