What is time 15 hours before 11 p.m.? - Vidyadip

Question

What is time 15 hours before 11 p.m.?

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Answer

15 ≡ x (mod 12)
15 – x = 12n
15 – x is a multiple of 12 x must be 3.
∴ The time 15 hrs before 11 O’clock is 11 – 3 = 8 O’ clock i.e. 8 a.m.

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