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.Management Sciences
Category: Problems on L.C.M and H.C.F
A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting point?
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A. 26 min 18 sec
B. 42 min 36 sec
C. 45 min
D. 46 min 12 sec
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The smallest fraction, which each of 6/7, 5/14, 10/21 will divide exactly is_________?
A. 30/7
B. 30/98
C. 60/147
D. 50/294
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Three numbers are in the ratio 3:4:5 and their L.C.M is 2400. Their H.C.F is:
A. 40
B. 80
C. 120
D. 200
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The product of two numbers is 2025 and their HCF is 15 their LCM is____________?
A. 2040
B. 2010
C. 135
D. 150
Find the least number of five digits which is exactly divisible by 12, 15 and 18?
A. 1080
B. 10080
C. 10025
D. 11080
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