A) 4
B) 10
C) 15
D) 16
Correct Answer: D
Solution :
[d] L.C.M. of 2, 4, 6, 8, 10 and 12 is 120 seconds or 2 min. So the bells will together toll after every two minutes. In 30 minutes, they will toll together \[\left( 30\div 2 \right)+1=16\] times.You need to login to perform this action.
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