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

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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.	15
D.	16
Answer» B. 10

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