Problems on H.C.F and L.C.M
A, B and C start at the same time in the direction to run around a circular stadium. A completes a round in 252 seconds and C in 198 seconds, all starting at the same point. after what time will they

45 minutes
26 minutes 18 econds
46 minutes 12 econds
42 minutes 36 econds

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Problems on H.C.F and L.C.M
What is the least number of that is exactly divisible by 4, 12, 15, and 18?

150
110
60
180

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