Problem: It takes seconds for a clock to strike o'clock beginning at o'clock precisely. If the strikings are uniformly spaced, how long, in seconds, does it take to strike o'clock?
Answer Choices:
A.
B.
C.
D.
E. none of these
Solution:
For the six strokes there are five equal intervals so that the time interval between successive strokes is one second. For twelve strokes, then, eleven seconds are required.