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)
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 ?
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:
170 comments Page 4 of 17.
Dive_nithi said:
6 years ago
Thank you for your excellent explanations @Sravanreddy.
Riya said:
6 years ago
Thanks @Sravanreddy.
GSS said:
6 years ago
Thnaks @Sravanreddy.
Sagar said:
7 years ago
As it is clear from the question and the answer provided that the bells Are going to toll together after every 2 min.
So, in the given interval of 30 min.
They will be going to toll 30/2 that is 15 times and early in the question they have mentioned that the bells are already toll together at once.
So, the answer is 30/2 + 1= 16 times.
So, in the given interval of 30 min.
They will be going to toll 30/2 that is 15 times and early in the question they have mentioned that the bells are already toll together at once.
So, the answer is 30/2 + 1= 16 times.
(2)
Shivam Tiwari said:
7 years ago
Why +1 is done in this can anyone say?
Orbis Roy said:
7 years ago
How to got 120 LCM? please explain me.
Ashif said:
7 years ago
Excellent explanation. Thank you so much. @Sravan.
Saanvi said:
7 years ago
Well said, Thanks @Sravanreddy.
Praful said:
7 years ago
15 should be the correct answer.
because
if, it is asked that how many times clock hands have coincided then the answer is 22 not 23.
because
if, it is asked that how many times clock hands have coincided then the answer is 22 not 23.
Imran said:
7 years ago
Nice explanation @Saravan.
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