Problem 8 · 2017 Math Kangaroo
Easy
Spatial & Visual Reasoning
reflectionspatial-reasoning
This picture shows you Anna's house from the front. At the back it has three windows but no door. Which picture shows Anna's house from the back?
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Answer: E
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Hint 1 of 2
The back of the house is the mirror image of the front, left and right swapped.
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Hint 2 of 2
The back has no door, so first rule out every picture that still shows a door.
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Approach: mirror the front view and require no door
- Seen from the back, left and right are swapped compared with the front.
- The back has three windows and no door, so reject any picture with a door.
- Mirroring the front's window positions and dropping the door matches one picture.
- That picture is E.
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