A flat square of paper is folded as shown in the image. The broken lines indicate the original position of the paper, and the solid lines indicate the position of the folded paper. The paper is never turned or twisted. The folded paper always remains within the edges of the 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 original square.
Choose the letter that corresponds to the image for which the black dots represent holes in the unfolded paper.
- A
- B
- C
- D
- E (correct answer)
Explanation: 8 layers; a corner punch produces 8 holes in two vertical columns — symmetric across the vertical midline, horizontal midline, AND the third fold line at y=0.25.