Problem:
As indicated by the diagram at the right, a rectangular piece of paper is folded bottom to top, then left to right, and finally, a hole is punched at . What does the paper look like when unfolded?
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Answer Choices:
A.
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B.
C.
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D.
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E.
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Solution:
The folded rectangle appears in the upper right corner of the sheet of paper, and the hole is punched in its upper left corner. Only Figure has a hole in the upper left corner of the upper right rectangle of the unfolded sheet.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions