Problem 7 · 2022 Math Kangaroo
Easy
Spatial & Visual Reasoning
sequence-of-figuresgrid
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Answer: D
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Hint 1 of 2
For each empty cell, look at the numbers already touching it on each side.
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Hint 2 of 2
The piece must place numbers that differ from every neighbour both inside and outside the gap.
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Approach: eliminate pieces by neighbour clashes
- Each cell of the gap borders some already-filled cells, which forbid certain numbers there.
- Test each option: a piece fails if any number lands next to an equal neighbour.
- Only piece D avoids every clash.
- So the missing piece is D.
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