Problems on H.C.F and L.C.M
The traffic light at three different road crossing 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 will they ag

6 : 27 : 12 hrs.
8 : 27 : 12 hrs.
7 : 27 : 12 hrs.
5 : 27 : 12 hrs.

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Problems on H.C.F and L.C.M
The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

1
3
2
4

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