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Question

Four bells ring at interval 6, 12, 18, 24 seconds. They starts ringing simultaneously at 8 o’ clock. When will they ring again together:


  1. 1 minutes 12 seconds past 8

  2. 2 minutes 24 seconds past 8

  3. 5 minutes 17 seconds past 8

  4. 2 minutes 27 seconds past 8


Solution

The correct option is A

1 minutes 12 seconds past 8


They will ring together again after L.C.M of (6, 12, 18, 24) seconds that means after 72 seconds (or) one minute 12 seconds.

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