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Method of Finding HCF

AN ELECTRONIC...

Question

AN ELECTRONIC DEVICE MAKES A BEEP AFTER EVERY 60 SECOND ANOTHER DEVICE MAKES A BEEP AFTER EVERY 62 SECOND .THEY BEEPED YOGETHER AT 10 AM AT WHAT TIME THEY WILL BEEP TOGETHER AT EARLIEST

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Solution

L.C.M. of 60 and 62 seconds is 1860 seconds
1860/60 = 31 minutes

They will beep together at 10:31 a.m.

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