No. LX.
The dotted lines in this diagram show how the figure can be divided into nine parts by four straight cuts
which can be reunited to form a perfect cross.
48. A SHARP BOY
Tom Larkins, proud of his prize for arithmetic, challenged his sisters to show on a blackboard that if 50 is subtracted from the sum of the nine digits, the result is equal to the number obtained by dividing their sum by 3. How did he prove his point?
No. LXI.—AN EASY ONE
Take in paper or cardboard a figure made up of a square and half of a similar square, thus:—