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Question
Three comets appear in the sky at regular periods of 11, 22 and 33 years respectively. If a comet has passed just now, what is the minimum time that we must wait for a comet to appear in the sky?
A
11 years.
B
34 years.
C
33 years.
D
22 years.
Soln.
Ans: a
Ans: a
The least of the given time periods is 11. So this is the minimum waiting time.