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 6 of 17.
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:
7 years ago
Excellent explanation @Sravan, thanks a lot!
Ankit said:
7 years ago
Please explain why 1 is added ?
Sairam said:
7 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?
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.
Misbah said:
8 years ago
Take a look to the question as it starts with 'six bells commence tolling together' that means they have already tolled for once and they are doing together every two minutes. In 30 seconds, they will toll for 15 times and we have to count the one they did at the beginning. So in 30 minutes they will toll for 16 times :).
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