Five bells toll together at the intervals of 5, 6, 8, 12 and 20 seconds respectively. Find the numbe

Five bells toll together at the intervals of 5, 6, 8, 12 and 20 seconds respectively. Find the number of times they toll together in one hour’s time (Inclusive of the toll at the beginning)

  1. 120
  2. 31
  3. 30
  4. 5
  5. None of These

Ans: 2

Solution: Time after which all the bells tol together is the LCM of 5, 6, 8, 12 and 20.
i.e., 120 seconds = 20   minutes
The number of times they toll together in one hour =  60/2  = 30 + 1 (beginning tone)
So, the answer is 31

Author Profile

IBPS Preparation Team
IBPS Preparation Team
At IBPS Preparation,We provide pathway for any candidate who wishes to shine in the recruitment process of IBPS.
READ  A milk man has three different kinds of milk 493liters, 551 liters and 435 liters. Find the minimum

Leave a Reply

Your email address will not be published. Required fields are marked *

4 + 5 =


IBPS Preparation © 2017
Inline
Inline