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.
Gargi said:
9 years ago
If LCM is 2772 then why we are dividing 2760 by 40?
(1)
Nagalakshmi said:
9 years ago
What will happen if we take HCF instead of LCM?
Prathi said:
9 years ago
How to take LCM of these numbers?
Shweta said:
9 years ago
@Liana.
To convert into minute = 2772/60 = 46 min and remainder is 12.
That's why 46 min 12 sec.
To convert into minute = 2772/60 = 46 min and remainder is 12.
That's why 46 min 12 sec.
(1)
Liana said:
9 years ago
Why is 12 seconds added?
Srikanth said:
9 years ago
Thanks @Sundar.
Umar said:
9 years ago
When to take LCM and HCF? Are there any keywords in the question?
Niha said:
9 years ago
Why we have to take LCM for this problem?
Kinjal said:
9 years ago
@Teja.
For train and distance question this question has inadequate data as there is no speed or distance given, hence we have to take it as L.C.M question.
For train and distance question this question has inadequate data as there is no speed or distance given, hence we have to take it as L.C.M question.
Syed Nadeem Asghar Rizvi said:
9 years ago
When I am doing 2772/60 (min) = 46.2 min is coming which means 46 mins. 2 secs.
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