Question

Fencepost Problem: You need to build one side of a fence that is 12 yards long. This
fence will be built with fenceposts and rails that connect one fencepost to another. If
each fencepost is 1 yard away from the next fencepost, how many fenceposts will be
needed for this side of the fence? How many fenceposts will be needed for a side of
a fence that is N (where N > 0) yards long?

Answer 1

The fence needs to start with a post so if it is 12 yards long it will need 13 fenceposts.

In general, if the fence is N yards long it will need N + 1 fenceposts