A flat square of paper is folded as pictured. Broken lines indicate the original position of the paper, and solid lines indicate the position of the folded paper. The paper is never twisted or turned. The folded paper always remains within the edges of its original square. After the last fold, a hole is punched in the paper. Your task is to mentally unfold the paper and determine the position of the holes on the original square. Choose the pattern of black circles that indicates the position of the holes on the unfolded paper.
Choose the letter that corresponds to the image for which the black dots represent holes in the unfolded paper.
- A
- B (correct answer)
- C
- D
- E
Explanation: Single anti-diagonal fold = 2 layers. Unfolds to 2 holes mirrored across y = 1 − x.
