Problems on H.C.F and L.C.M
Find the smallest number of two digits which on being divided by 2, 3, 4 and 5 leaves 0, 1, 2 and 3 as remainder respectively.

58
55
61
65

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Problems on H.C.F and L.C.M
What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?

770
630
420
540

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

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