manual

64
How to do it:
1) Attach the two balls together with a cord
the length of a palm and place them so they
hang over the large circle.
2) Carefully bend the large circle — so
it doesn’t go out of shape — as in the
picture. Thread the little circle over
the large one and let it come right
down to the cord connecting the
balls. Unbend the big circle again.
The reverse operation is the solution to the
challenge on the previous page.
This is another topological math trick.
If bent, the large foam circle can fit through the small circle.