Q.N(1) On the main road three consecutive traffic lights change after 36, 42, and 72 minutes respectively. if the light is first switched on at 12:00 A.M. sharp, at what time will they change simultaneously?

A. 08:22 PM

B.09:24 PM

C. 08:30 PM

D.08:24 AM

option D correct

Q.N.(2) The least number which when divided by 4,6,8,12and 16 leaves a remainder of 2 in each case is:

A. 48

B. 98

C. 50

D. 46

option C correct

Q.N.(3) Three trains A, B, C start running at the same time point in the same direction in a circular track. train A completes a round in 252 minutes, train B in 308 minutes and train C 198 in minutes. after what time will they meet again at the starting point?

A. 26 hours 18 minutes

B. 42 hours 36 minutes

C. 45 hours

D. 46 hours 12 minutes

option D correct

Q.N.(4) Product of the two co-prime numbers is 1443. then their L.C.M is?

A. 37

B. 39

C. 22

D. 1443

option D correct

Q.N(5) The H.C.F and L.C.M of the two numbers are 12 and 336 respectively. if one of the numbers is 84, the other is

A. 36

B.48

C.72

D.96

option B correct

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