A wall clock strikes once at 1 o'clock, twice at 2 o'clock, and so on. How many total strikes does it make in a single 24-hour day?
156
In 12 hours, the strikes equal 1 + 2 + ... + 12 = 78. Over 24 hours (two 12-hour cycles), the total is 78 * 2 = 156.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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