Three bells commence tolling together and toll at intervals of 2, 4, 6 seconds respectively. In 10 minutes, how many times do they toll together ?	Choose the correct choice from the following options:
A) 51	B) 52	C) 53	D) 54	E) 55
LCM of 2, 4, 6 is 12.   So, after each 12 seconds, they would toll together.   Hence, in 10 minutes, they would toll 10*60 seconds / 12 seconds = 50 times   But then the question says they commence tolling together. So, they basically also toll at thebeginning(0second).   So, total tolls together = 50+1= 
<gadget id="calculator">50+1</gadget>
<output>51</output>
51   51nswer: 51
<result>A</result>
Three bells commence tolling together and toll at intervals of 2, 4, 6 seconds respectively. In 10 minutes, how many times do they toll together ?