Five bells commence tolling together and toll at intervals of 3,6,9,12 and 15 seconds respectively.  In 30 minutes, how many times do they toll together? - Study24x7
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Five bells commence tolling together and toll at intervals of 3,6,9,12 and 15 seconds respectively.  In 30 minutes, how many times do they toll together?

A

4

B

10

C

15

D

16

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