Problem 17 · 2021 Math Kangaroo
Hard
Spatial & Visual Reasoning
tiling-tessellation
Mara built the square by using 4 of the following 5 shapes. Which shape was not used?
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Answer: D
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Hint 1 of 3
Only 4 of the 5 shapes are used to build the square, so one is left over.
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Hint 2 of 3
Try fitting the shapes into the square like puzzle pieces, matching the little symbols.
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Hint 3 of 3
The shape that has no place to fit is the one that was not used.
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Approach: fit four pieces into the square
- The square is built from exactly 4 of the 5 shapes, so one shape is left out.
- Fit the shapes into the square so their symbols line up, like a jigsaw.
- The shape that does not fit anywhere is option D, so D was not used.
Mark:
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