After you have looked at this Magic Square, and set it out on the table, shuffle the cards, and try to re-arrange them so as to give the same results.
No. CIX.—A TRANSFORMATION
Cut a square of paper or cardboard into seven such pieces as are marked in this diagram.
Can you rearrange them so that they form the figure 8.
A SECRET REVEALED
There are several ways in which strange juggling with figures and numbers is to be done, but none is more curious than this:—
Ask someone, whose age you do not know, to write down secretly the date and month of his birth in figures, to multiply this by 2, to add 5, to multiply by 50, to add his age last birthday and 365. He then hands you this total only from this you subtract 615. This reveals to you at a glance his age and birthday.