Problems on H.C.F and L.C.M
The traffic lights at three different road crossings change after every 48 sec., 72 sec and 108 sec.respectively .If they all change simultaneously at 8:20:00 hours,then at what time they again change

8:27:12 hrs
10:13:17 hrs
7:25:14 hrs
9:22:08 hrs

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Problems on H.C.F and L.C.M
Find the smallest number which when increased by 5 is divisible by 9, 21, 25 and 30.?

1882
2567
2378
3145

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