A wall clock chimes once at 1 o'clock, twice at 2 o'clock, three times at 3 o'clock, and so on. In addition, it chimes once at every half-hour mark (e.g., 1:30, 2:30). How many total chimes will the clock make from 12:05 PM up to and including 4:00 PM on the same day?
14 chimes
The chimes occur at 12:30 (1), 1:00 (1), 1:30 (1), 2:00 (2), 2:30 (1), 3:00 (3), 3:30 (1), and 4:00 (4). Summing these gives 1 + 1 + 1 + 2 + 1 + 3 + 1 + 4 = 14 chimes.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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