Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10, 12 seconds respectively. In 30 minutes, how many times do they toll together ?

Six bells commence tolling together and toll at intervals of 2, 4, 6,

1.	Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10, 12 seconds respectively. In 30 minutes, how many times do they toll together ?
A.	16 times
B.	19 times
C.	21 times
D.	24 times
Answer» B. 19 times

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Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10, 12 seconds respectively. In 30 minutes, how many times do they toll together ?

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