Q129
Five bells begin to toll together and toll respectively at intervals of 6, 7, 8, 9 and 12 seconds. After how many seconds will they toll together again ?
A.
72 seconds
B.
612 seconds
C.
504 seconds
AnswerD.
318 seconds
Answer: Option C
Solution
Answer: Option C
Solution:
LCM of (6, 7, 8, 9, 12)LCM = 3 × 2 × 7 × 4 × 3 = 504
They will toll after every 504 seconds