Problem 3 · 2020 Math Kangaroo
Easy
Spatial & Visual Reasoning
transformations
The board shown is made of small white and dark squares. After a ninety-degree turn, how could this board look?
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Answer: D
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Hint 1 of 2
A quarter turn moves the top row to a side and changes which way the pattern leans.
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Hint 2 of 2
Rotate the dark/white pattern 90 degrees and find the matching grid.
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Approach: rotate the dark-square pattern a quarter turn
- Pick out the positions of the dark squares in the given board.
- Turn the whole board 90 degrees: every square slides to its rotated position, so the pattern tips onto its side.
- Comparing the five options, only board D shows that exact rotated arrangement.
Mark:
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