1.

Six different bells in a tower doll at the intervals of 9 sec, 12 sec, 15 sec, 18 sec, 21 sec and 24 sec respectively. If all of them toll at 6 am, the next time they toll together is: (1) 7.42 am (2) 6.42 am (3) 8.00 am (4) 9.00 am

Answer»

Correct option is (2) 6.42 am



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