A clock buzzes 1 time at 1 o’clock , 2 times at 2 o’clock , 3 times

Question

A clock buzzes 1 time at 1 o’clock , 2 times at 2 o’clock , 3 times at 3 o’clock and so on . What will be the total number of buzzes in a day?

Options:

A . 146

B . 156

C . 166

D . none of these

Answer: Option B

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kanhaiya jha 2016-07-09 23:46:34

Answer is: B
Number of buzzes in a day = [12(12+1)/2]x2 = 156

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