Five bells begin to toll together at intervals of 9 seconds, 6 seconds – McqOptions

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1.	Five bells begin to toll together at intervals of 9 seconds, 6 seconds, 4 seconds, 10 seconds and 8 seconds respectively. Starting together, how many times will the bells toll together in a span of 1 hour?
A.	11
B.	12
C.	5
D.	10
Answer» B. 12

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