Problem 7 · 2024 Math Kangaroo
Easy
Spatial & Visual Reasoning
reflectionsymmetry
Tim has black and white paper squares. He glues them onto the inside of a window, making the pattern shown on the right. What pattern do you see when you look at the window from the outside? (The answer choices are the five pictured grids.)
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Answer: D
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Hint 1 of 3
Think about looking at a sticker stuck on the inside of a window when you walk around to the outside.
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Hint 2 of 3
Seen from the other side, the picture is flipped left-to-right (like in a mirror), but the top stays on top.
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Hint 3 of 3
Flip the shown pattern so its left column becomes the right column, then find the matching choice.
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Approach: flip the inside pattern left-to-right to see it from outside
- The squares are glued on the inside, so from the outside you see the same picture flipped left-to-right (top still on top).
- Flipping swaps each row's leftmost cell with its rightmost cell.
- Do this to the shown black-and-white pattern.
- The flipped pattern is the one in choice D.
Mark:
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