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A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 2.ri2 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 noint ?

A) 26 minutes 18 seconds

B) 42 minutes 36 seconds

C) 45 minutes

D) 46 minutes 12 seconds


Four different electronic devices make a beep after every 30 minutes, 1 hour, 1.5 hour
and 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at :

A) 12 midnight

B) 3 a.m.

C) 6 a.m

D) 9 a.m.


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