A clock strikes once at 1 O' clock, twice at 2 O' clock
A clock strikes once at 1 O' clock, twice at 2 O' clock, thrice at 3 O' clock and so on. What is the total number of striking in a day?
A156
B146
C136
D166
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Answer is: 156
If it's the total number of strikes, then it's 1 + 2 +3....+ 12 all multiplied by 2, because we are calculating it for a day (24 hours).
For Calculating purpose
First 12 Hours is => 1 2 3 4 5 6 7 8 9 10 11 12
Next 12 Hours is => 12 11 10 9 8 7 6 5 4 3 2 1
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Total 24 Hours is => 13 13 13 13 13 13 13 13 13 13 13 13
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=>13 *12
=>156
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