Arrange eight matches as shown in Fig. 24, and state that this
enclosure, formed by eight hurdles, is supposed to hold one hundred
sheep. Ask your friends how many more hurdles would be required to
enable the enclosure to contain two hundred sheep? The reply is
generally eight more, and your friends will be surprised to learn that
only two more hurdles are required--one at each end across the
enclosure. Three hurdles being moved to admit of the introduction of the
additional two, the pen will, of course, be doubled in size.
----- ----- -----
| |
| |
| |
----- ----- -----
Fig. 24.