A clock strikes once at 1 o’clock, twice at 2 o’clock, and so on. How many times will it strike in 24 hours?
A78
B156
C144
D300
Explanation
Sum = 1+2+…+12 = (12*13)/2 = 78. In 24 hours = 78 * 2 = 156.
Exam Relevance
- Topic: Clocks & Calendar
- Subtopic: Strikes
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