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Apr 11, 2015
Three bells toll at intervals of 3, 5 and 7 minutes. All the bells toll at 3 PM. When will they toll tegether for the second time?
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3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 etc. 7 14 21 28 35 42 49 56 63 etc. 5 10 15 20 etc.
I'm doing this quickly, so might have missed something - you can do the careful checking.
But I think the first common multiple is 105.
Therefore the bell would r...See More