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:
171 comments Page 8 of 18.
Surajbhan singh said:
6 years ago
Why 1 is added your answer in the question. Read it once again carefully.
(1)
Sukanya said:
9 years ago
Can you please tell me how to calculate LCM? I am not understanding.
Sahil said:
9 years ago
@Anare: it represents that after every 120sec bells toll together.
Pardeep said:
8 years ago
I am not able to understand it. Why one is added at the last step?
Rohan bhoir said:
1 decade ago
Can you tel me how is the HCM can find? Explain with any example.
Ashna said:
9 years ago
It shouldn't be +1 it is 2 that's when we get 16 as the answer.
Malatha said:
1 decade ago
I also didn't understand why did we add '1'? please tell me.
Lahu said:
9 years ago
@Balaraju Hari.
It is Awesome, Thanks for your explanation.
It is Awesome, Thanks for your explanation.
Avinash said:
7 years ago
Please explain in an easy way as why lcm method to be used?
Janu said:
6 months ago
HCF is 2
Then 30/2 = 15
Stating stage 1time ,15 + 1 = 16.
Then 30/2 = 15
Stating stage 1time ,15 + 1 = 16.
(5)
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