A clock strikes once at 1 O' clock twice at 2 O'clock thrice 3 O' clock and so, on. How many times will it strikes in 24 hours?

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RRB ASSISTANT LOCO PILOT (Allahabad) 2010 click here to view all questions

A clock strikes once at 1 O' clock twice at 2 O'clock thrice 3 O' clock and so, on. How many times will it strikes in 24 hours?

A78

B136

C156

D196

raju ? Dec 23 '2019 at 18:21

Correct answer is: 156

Explanation:

clock strikes once at 1 o'clock, twice at 2o'clock , thrice at 3 o'clock so on.
then clock strikes in 12 hour = 1 + 2 + 3 + ..... + 12 = 78
Therefore clock strikes in 24 hour = 78 X 2 = 156.

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Correct answer is: 156 Explanation: clock strikes once at 1 o'clock, twice at 2o'clock , thrice at 3 o'clock so on. then clock strikes in 12 hour = 1 + 2 + 3 + ..... + 12 = 78 Therefore clock strikes in 24 hour = 78 X 2 = 156. raju ? answered Dec 23 '2019 at 18:21 All Comments

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