Problems on H.C.F and L.C.M
Find largest number of 4 digits divisible by 12, 15, 18, 27 ?

11340
10478
9720
12765

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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

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

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