HCF and LCM of Numbers



Question (1/84)

Sam, Kevin and Jack start at the same time in the same direction to run around a circular stadium. Sam completes a round in 252 seconds, Kevin in 308 seconds and Jack in 198 seconds. After how much time they will meet again at the starting point ?

(A)  26 Minutes 18 Seconds


(B)  42 Minutes 36 Seconds


(C)  45 Minutes 12 Seconds


(D)  46 Minutes 12 Seconds


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Question (2/84)

Four different alarms ring after every 30 minutes, 60 minutes, 90 minutes and 105 minutes respectively. All of them ring together at 12 in the afternoon. When will again they ring together. 

(A)  12 PM


(B)  3 AM


(C)  6 AM


(D)  9 AM


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