Bernoulli – Number Match Brainteaser Wooden Puzzle

The puzzle has 9 wooden tiles with 4 laser engraved numbers plus the wooden frame.

The object of this puzzle is to take the pieces out of the wooden frame, mix them and then put them back in the frame, but there is a task you must accomplish. As you can see, when the tiles are in place there are numbers from one tile that are next to a number belong to the tile next to it – this is called ‘pair numbers’. Your goal is to make sure all ‘pair numbers’ (2 numbers that each one of them belong to a different tile) across the entire puzzle sum to the same number (see illustration below).