CAT Lcm — practice questions

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Lcm questions and exercises with answers

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Six bells toll at intervals of 2, 4, 6, 8, 10 and 12 seconds. In 30 minutes, how many times do they toll together?Read the answer and worked solution →

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Six bells toll at intervals of 2, 4, 6, 8, 10 and 12 seconds. In 30 minutes, how many times do they toll together?

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Correct answer: D. 16

1. They toll together every LCM(2,4,6,8,10,12) = 120 seconds. 2. In 30 minutes = 1800 seconds, number of intervals = 1800/120 = 15. 3. Counting the initial toll (t=0), total tolls together = 15 + 1 = 16. _Source: KMAT Karnataka 2021 PYQ Q.35_

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