Puzzles & Quizzes

Can You Solve the Tetrahedron Puzzle?

This tricky puzzle involves a tetrahedron. Read the puzzle below, then scroll down to get the answer.

Here's the Puzzle

You have a tetrahedron and a pyramid with equal side lengths. A tetrahedron is made up of four equilateral triangles (a total of four sides), and a pyramid is made up of four equilateral triangles and a square base (a total of five sides). The two shapes are glued together on a triangular face. How many faces are there on the resulting figure? This was on a 1980 PSAT math exam question ... and many people got it wrong.

Here's the Answer

You can see the answer in the video above. Did you get it?

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Written by Curiosity Staff January 29, 2016

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