Question

Suppose you need to measure the length of a long piece of yarn. You only have a ruler to measure with. The yarn is longer than the length of the ruler. What can you do to find the length of the yarn?

Answer 1

Since the yarn is longer than the ruler, mark where the string meets the end of the ruler with a pencil, or with your finger. Then, move the ruler up until the end of the string, record the length. Finally, add the two lengths.

EXAMPLE:
The ruler is 12 inches long. The string continues for 3 more inches. Add the two, the string is 15 inches.