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. 7)
7.
Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:
Answer: Option
Explanation:
Let the numbers be 3x, 4x and 5x.
Then, their L.C.M. = 60x.
So, 60x = 2400 or x = 40.
The numbers are (3 x 40), (4 x 40) and (5 x 40).
Hence, required H.C.F. = 40.
Discussion:
42 comments Page 5 of 5.
Khagendra Thapa Kazzi said:
4 months ago
Let the numbers be 3x, 4x and 5x.
Then, their L.C.M. = 60x.
So, 60x = 2400 or x = 40.
Hence, the required H.C.F. = 40.
Then, their L.C.M. = 60x.
So, 60x = 2400 or x = 40.
Hence, the required H.C.F. = 40.
(2)
Narmatha said:
2 months ago
LCM = 2400,
Radio = 3:4:5,
Hcf = 2400/3*4*5,
Hcf = 40.
Radio = 3:4:5,
Hcf = 2400/3*4*5,
Hcf = 40.
(3)
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