6. ANSWER TO THE CROSS PUZZLE.
7. ANSWER TO THE THREE-SQUARE PUZZLE.
Take away the pieces numbered 8, 10, 1, 3, 13, and three squares only will remain.
ANSWER TO NO. 8.
Take a round cylinder of the diameter of the circular hole, and of the height of the square hole. Having drawn a straight line across the end, dividing it into two equal parts, cut an equal section from either side to the edge of the circular base, a figure like that represented by the woodcut in the margin would then be produced, which would fulfil the required conditions.
9. ANSWER TO THE NUNS’ PUZZLE.
