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 9 of 17.
Dive_nithi said:
6 years ago
Thank you for your excellent explanations @Sravanreddy.
Sangeeta said:
1 decade ago
I didn't understand why did we add 1?
Please explain.
Please explain.
Vasu said:
1 decade ago
Thanks to both Sravan and Sundar for your explanation.
Pragati said:
7 years ago
Please anyone explain me again, I am not getting this.
Gachagirl said:
1 year ago
Why do we need to do lcm? Anyone please explain to me.
(19)
Kinjal jain said:
7 years ago
Thanks for the perfect explanation @Sravanreddypaila.
Kp mukesh kumar singh said:
1 decade ago
Superb, it is indispensable for general competition.
Vipul said:
8 years ago
I cannot understand why 1 is added in the last step?
Chandan said:
8 years ago
Thanks for the great explanation @Sravanreddypailla.
Muneesh said:
10 years ago
Formula: (n/2+1) from n--30.
= 30/2+1 = 16 answer.
= 30/2+1 = 16 answer.
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