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 1 of 7.
Priya said:
1 decade ago
I didn't understand how you took 2772 into 46 minutes and 12 seconds.
(1)
Sundar said:
1 decade ago
60 seconds = 1 minute
2760 seconds = 46 minute [Note: 2760/60 = 46]
Therefore,
2772 sec = 2760 + 12 seconds (or) 46 min 12 sec.
Hope you got it. Have a nice day!
2760 seconds = 46 minute [Note: 2760/60 = 46]
Therefore,
2772 sec = 2760 + 12 seconds (or) 46 min 12 sec.
Hope you got it. Have a nice day!
(3)
Sujay said:
1 decade ago
When to take lcm and when to take HCF is confusion ? please help.
(1)
Kiran soni said:
1 decade ago
How can I quickly find 2772 LCM ?
Please reply.
Please reply.
(1)
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?
Kranthikumar said:
1 decade ago
When to take lcm & hcf. Its confusing.
Ramya said:
1 decade ago
Can anyone tell me how to take quick L. C. M for big numbers? please.
Parveen Kumar said:
1 decade ago
How do we decide that we calculate LCM or HCM?
Anish said:
1 decade ago
Why do you take LCM?
Rahul said:
1 decade ago
How the lcm 2772 came ? when I calculated it is big enough than 2772. Please explain me.
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