Problem 12 · 2009 Math Kangaroo
Medium
Spatial & Visual Reasoning
transformationsspatial-reasoning
Picture X is paired with picture Y. Which of the following pictures is paired with picture G?
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Answer: E
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Hint 1 of 3
Lay picture X next to picture Y and notice what changed about every single square.
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Hint 2 of 3
It is the same little rule done to every square, so do that very same thing to picture G.
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Hint 3 of 3
Then look through the five choices for the picture you would get.
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Approach: spot that Y is X with every square's colour flipped, then flip G
- Compare X with Y square by square: every dark square in X is white in Y, and every white square is dark.
- So the rule is simply 'swap the colours of all the squares.'
- Do the same to picture G: turn each of its dark squares white and each white square dark.
- The picture you get is option E, so E is paired with G.
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