Question

Five bells commence tolling together and toll at intervals of 2,3,4,5 and 8minutes respectively. In 12 hrs., how many times do they toll together?

• A. 16
• B. 30
• C. 7
• D. 15

Answer 1

Answer:

C. 7

LCM of the time intervals will be 120 min 12hr=12x60=720 min number of times they all toll together = (720/120)+1=6+1=7