Problem 16 · 2025 Math Kangaroo
Hard
Spatial & Visual Reasoning
tiling-tessellationcomposition
Eva puts these two identical pieces together to make a figure. Which of these figures can she not build?
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Answer: E
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Hint 1 of 2
The two identical pieces can be flipped and turned - try fitting them into each shape.
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Hint 2 of 2
Four shapes can be tiled by the two pieces; the odd one out is the answer.
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Approach: try to tile each shape with the two identical pieces
- Each given piece is a fixed shape; you may rotate or flip it.
- Try assembling each option from exactly two copies.
- Four of them work, but the arrow shape in option E cannot be formed.
- So Eva cannot build E.
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