Problem 2 · 2025 Math Kangaroo
Easy
Spatial & Visual Reasoning
reflectionsymmetry
Anna builds a wall out of black and grey bricks that shows 2025. What can Bella read on the back of the wall? (The five choices A–E are pictured below the question.)
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Answer: E
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Hint 1 of 2
Looking at the back of a wall is like seeing it in a mirror.
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Hint 2 of 2
Reflect the whole ‘2025’ left-to-right; each digit flips and the order of digits reverses.
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Approach: horizontal mirror reflection
- Seeing the back of the wall is exactly like holding the front up to a mirror, so the whole picture flips left–right.
- Two things happen at once: the order of the digits reverses (so 2025 reads 5202), and each digit itself is mirrored.
- The choice that shows this left–right flip of the bricks is the back view, which is (E).
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