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. 15)
15.
A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and c in 198 seconds, all starting at the same point. After what time will they again at the starting point ?
Answer: Option
Explanation:
L.C.M. of 252, 308 and 198 = 2772.
So, A, B and C will again meet at the starting point in 2772 sec. i.e., 46 min. 12 sec.
Discussion:
66 comments Page 4 of 7.
Viswa said:
7 years ago
Thank you all for explaining the answer.
Shubham said:
7 years ago
Thanks for all the given explanation.
Nagul said:
7 years ago
@All.
Simple solution:
The L C M of given number = 2772
=> 2772 ÷ 60 we get 46 as quotient and 12 as a reminder.
Simple solution:
The L C M of given number = 2772
=> 2772 ÷ 60 we get 46 as quotient and 12 as a reminder.
Zikpe said:
6 years ago
Just take LCM of 252, 308 & 198.
LCM = 2772 seconds or 46 minutes 12 seconds.
LCM = 2772 seconds or 46 minutes 12 seconds.
Anitha said:
6 years ago
LCM is 2772.
So, 2772/60 = 46min 12sec.
So, 2772/60 = 46min 12sec.
Ramya said:
1 decade ago
Can anyone tell me how to take quick L. C. M for big numbers? please.
Kranthikumar said:
1 decade ago
When to take lcm & hcf. Its confusing.
Akshay said:
1 decade ago
I am quite weak in determing the LCM. How did you arrive to a conclusion of 2772 ? could you show me the workings?
Madhavi said:
1 decade ago
Actually my problem is- taking out LCM will give when they'll meet i.e. it'll give the time at which they'll meet again but it's not necessary that they meet at the starting point? I guess dean's logic is correct.
Anish said:
1 decade ago
Why do you take LCM?
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