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A clock strikes once at 1 o'clock, twice at 2 o'clock, ..., twelve times at 12 o'clock. How many times will the bell strike in course of 2 days?

  1. A
    78
  2. B
    264
  3. C
    312
  4. D
    144

Solution & Step-by-step Explanation

Number of strikes in 12 hours:


A day has 24 hours (two 12-hour cycles). Therefore, 2 days will have 4 cycles of 12 hours.
Total number of strikes in 2 days:

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A clock strikes once at 1 o'clock, twice at 2 o'clock, ..., twelve times at 12 o'clock. How many times will the bell strike in course of 2 days?
A
78
B
264
C
312
D
144

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