Count the Shapes
Determine the number of given shapes in the picture.
There are mainly two types of puzzles falls upon this rule.
- Given shapes can be substituted by "triangles", "equilateral triangles", "rectangles", "squares", etc. The puzzle is more combinatorial. Or,
- Given shapes can be substituted by "identical shapes". The puzzle is more observational.
History of the puzzle
A puzzle that asks to count the number of equilateral triangles in the given diagram is present in Sam Loyd's (USA) Cyclopedia of 5000 Puzzles, Tricks, and Conundrums (With Answers).
Appearances in the past WPCs
- WPC 2017/Round 17 by Rakesh Rai, Amit Sowani