Pyramidouble - Brain Teaser Wooden Puzzle

Solve It

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The pieces of this game are based on one of the classic riddles in the world of brain teasers.
Begin by taking two of the pieces and trying to make a tetrahedron (a pyramid whose base a triangle). This puzzle is more difficult than it appears. To complete this puzzle you must visualize the pieces at 60 degree angles rather than 90 or 180 degree angles. 
Next, try to fit all four pieces into the box. The four pieces won't fit tightly or fill the box but they will fit perfectly so that the square piece on the lid is facing the inside.
It is easier then you think…  

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