Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

• lcm of 2,4,6,8,10,12 is 120 =2 mins. 30/2+1=16
• 14 years agoHelpfull: Yes(17) No(1)
• after two min they toll together and at 0th moment dey toll together so after 30 min total no toll will be 15+1=16
• 14 years agoHelpfull: Yes(7) No(0)
• The answer will be 15.
  Because in every 120 seconds(2 minutes) all the 6 bells will tolling together.so in 30 minutes total 15 times they will be tolling together.LCM of 2,4,6,8,10,12=120.
• 14 years agoHelpfull: Yes(4) No(6)
• 15
• 14 years agoHelpfull: Yes(2) No(5)
• After every every 60 secs or 1 minute , they all toll together.
  so in 30 minutes , they will toll together 31 times including first and last toll.
• 14 years agoHelpfull: Yes(0) No(14)