IndiaBIX

Aptitude - Problems on H.C.F and L.C.M - Discussion

Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 3)
Problems on H.C.F and L.C.M
3.
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 ?
4
10
15
16
Answer: Option
Explanation:

L.C.M. of 2, 4, 6, 8, 10, 12 is 120.

So, the bells will toll together after every 120 seconds(2 minutes).

In 30 minutes, they will toll together 30 + 1 = 16 times.
2

Discussion:
171 comments Page 6 of 18.
Pinky said:   7 years ago
Excellent explanation, Thanks @Saravan.
Kishore said:   7 years ago
Well done @Sundar.
Suja said:   7 years ago
Thank you everyone for the solution.
Kinjal jain said:   7 years ago
Thanks for the perfect explanation @Sravanreddypaila.
Ramya.S said:   7 years ago
Thank @Sravanreddy.
Trai said:   8 years ago
Excellent explanation @Sravan, thanks a lot!
Ankit said:   8 years ago
Please explain why 1 is added ?
Sairam said:   8 years ago
One doubt. Let's take all the bells are tolling together. There are two questions. First question how many tolls from 7 to 7:30 and the second question being g 7:30 to 8. One bell tolls at 7:30. Should we count it on the first case or the second case?


Can anyone solve this?
Mahiraji said:   8 years ago
Awesome explanation. Thank you all.
Poornima said:   8 years ago
I clearly understand the answer thank you all.
Post your comments here:

Your comments will be displayed after verification.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers