Six bells are tolled together. They toll at the intervals of 3, 5, 8, 9, 12 and 15 seconds respectively in 24 hours. How many times do they toll together? (A) 4 (B) 120 (C) 12 (d) 240 (E) None of these
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Answer:
The bells will toll together when there is one time interval which is divided by every single time interval.
Thus, we need to find the LCM of 2,4,6,8,10,12
LCM : 120
Thus, in 30 minutes = 30 * 60 seconds, they will toll together:
= 15
IMO the answer is c
Step-by-step explanation:
The bells will toll together when there is one time interval which is divided by every single time interval.
Thus, we need to find the LCM of 2,4,6,8,10,12
LCM : 120
Thus, in 30 minutes = 30 * 60 seconds, they will toll together:
= 15
IMO the answer is C.
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