We have two pyramids, a square-base right pyramid and a triangle-base right pyramid. All the edges of both the pyramids are of equal length. We joined both the pyramids with one of the triangle-faces of one pyramid coinciding with one of the triangle-faces of another. What are the total number of faces of the new solid figure obtained?
Source : Winkler - Mathematical puzzles (Please go through this book. It is really good)
3 comments:
7 ??
No its not 7. Think again.
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