Problem 4 · 2019 Math Kangaroo
Easy
Spatial & Visual Reasoning
foldingreflection
There are two holes in the cover of a book. The book lies on the table opened up (see diagram). After closing up the book, which vehicles can Olaf see through the two holes?
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Answer: D
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Hint 1 of 2
When the cover folds over, the holes line up above the page on the right.
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Hint 2 of 2
The folded cover flips left-to-right, so the vehicles appear in mirror order through the two windows.
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Approach: fold the cover and look through the holes
- Folding the cover onto the page flips it like a mirror.
- The two holes then sit over two groups of vehicles, but in reversed left-right order.
- Matching the windows to the line of vehicles gives the set in option D.
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