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?

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

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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 ?

630
420
540
770

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP