Multiple choice

How many times are the hands of a clock in a straight line in 84 hours? (Starting from 00:00) 84 घण्टे में घड़ी की सूईया कितनी बार एक सीधी रेखा में रहती है। (प्रारम्भ होना का समय 00:00)

  1. 44

  2. 154

  3. 77

  4. 86
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In 12 hours, clock hands are in a straight line 22 times (11 times at 180° opposite, 11 times overlapped at 0°). In 84 hours = 7 × 12 hours, so 7 × 22 = 154 times. The hands form a straight line when they are either exactly opposite (180° apart) or exactly overlapping (0° apart), happening 11 times each in 12 hours.

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