Reply To: Puzzles

Card and Paper Puzzle Answer

Although it may seem surprising, the minimum square side is 50mm. The square is cut and then the newspaper is folded along the diameter of the square hole and the circle offered up to the hole inside the fold. By gently moving the opposite sides of the hole down the circle, the paper forms a collapsed pyramid shape and the two cut edges form a straight line of total length 100mm. At this point the card circle will slide through.