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- Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively.
Question 1:
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together? A. 4
B. 10
C. 16
Feedback L.C.M. of 2, 4, 6, 8, 10, 12 is 120. So, the bells will toll together after every 120 seconds(2 minutes). In 30 minutes, they will toll together30 + 1 = 16 times.
D. 15
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