Problems on H.C.F and L.C.M
A, B and C start running around a circular stadium and complete one round in 27 s, 9 s and 36 s, respectively. In how much time will they meet again at the starting point?

1 minute 48 seconds
3 minute 48 seconds
2 minute 48 seconds
4 minute 48 seconds

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Problems on H.C.F and L.C.M
HCF of two numbers is 27 and sum of the two numbers is 216. How many such pairs of numbers are possible?

3
4
1
2

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