Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60
minutes how many times they will toll together. Options.
A) 15 B) 16 C) 30 D) 31 E) None of these
Explanation:   LCM of 2-4-6-8-10-12 is 120 seconds, that is 2 minutes.   Now  60/2= 
<gadget id="calculator"> 60/2</gadget>
<output>30</output>
30   Adding one bell at the starting it will  30+1= 
<gadget id="calculator"> 30+1</gadget>
<output>31</output>
31   Answer: Option 31
<result>D</result>
Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60
minutes how many times they will toll together.