alleryA striking clock rings 1 stroke at 1 o'clock up to 24 strokes at 24 o'clock. How many strokes a day?
A288
B276
C312
D300
Answer & Solution
Correct answer: D. 300
1. Add the numbers 1 to 24.
2. The sum is 24 x 25 / 2 = 300.
3. This heavy total is why such striking clocks wore out their mechanism and some towns switched to 1 to 12 twice.
_Source: Wikipedia, 24-hour clock, History_
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