Five bells ring together and ring at intervals of 2, 6, 8, 12 and 15 seconds respectively. How many times will they ring together in 60 minutes?	Choices
A) 34
B) 33
C) 32
D) 31
E) 30
Explanation:   LCM of 2, 6, 8, 12 and 15 is 120   120 second = 2 minutes   Six bells rings in 2 min intervals   Therefore, Number of times they ring together in 60 min = 1 + (60/2)= 
<gadget id="calculator">1 + (60/2)</gadget>
<output>31</output>
31   Answer: Option 31
<result>D</result>
Five bells ring together and ring at intervals of 2, 6, 8, 12 and 15 seconds respectively. How many times will they ring together in 60 minutes?