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.  Choose the correct answer:	A) 15	B) 16	C) 30	D) 31	E) 32
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   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.