Problem 13 · 2025 Math Kangaroo
Stretch
Spatial & Visual Reasoning
cube-viewsspatial-reasoning
Mike has the two building blocks shown. Which of the objects cannot be built with these two building blocks?
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Answer: E
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Hint 1 of 3
Both blocks together are made of 6 little cubes, so every object you build must use 6 cubes too.
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Hint 2 of 3
Try to colour each object into the bent piece and the straight piece.
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Hint 3 of 3
If you cannot split an object into exactly those two shapes, that object is the impossible one.
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Approach: try to split each object into the two given pieces
- The two blocks are a bent 3-cube piece and a straight 3-cube piece.
- For four of the objects you can colour them into the bent piece plus the straight piece.
- Object E cannot be split into exactly those two pieces, so the answer is E.
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