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:
172 comments Page 18 of 18.
Heisenberg said:
11 months ago
We add 1 because the bell rings at 2, 4, 6, 8, 10, and the starting ring happens at 0 which it is considered as default.
Starting point : 0.
Interval : 2, 4, 6, 8, 10.
Starting point : 0.
Interval : 2, 4, 6, 8, 10.
(9)
Anjil said:
1 week ago
@All.
If the bells didn't ring together, would we still add 1. Anyone, please explain to me.
If the bells didn't ring together, would we still add 1. Anyone, please explain to me.
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