How many times will 5 bells ring together in 1 h if they start together and ring at intervals of 2, 3, 4, 5, and 6 sec, respectively?

71 times

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60 times

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59 times

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61 times

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Solution

The correct option is B 60 times
LCM of 2, 3, 4, 5, and 6 is 60, i.e., $60 s e c = 1 m i n$ .
Therefore, they ring together once in a minute and, hence, 60 times in an hour.

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How many times will 5 bells ring together in 1 h if they start together and ring at intervals of 2, 3, 4, 5, and 6 sec, respectively?

The correct option is B 60 timesLCM of 2, 3, 4, 5, and 6 is 60, i.e., 60sec=1min.Therefore, they ring together once in a minute and, hence, 60 times in an hour.

The correct option is B 60 times
LCM of 2, 3, 4, 5, and 6 is 60, i.e., $60 s e c = 1 m i n$ .
Therefore, they ring together once in a minute and, hence, 60 times in an hour.