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. 29)
29.
The H.C.F. of 9 , 12 , 18 and 21 is:
10 25 35 40
3
5
252
5
3
1400
63
700
Answer: Option
Explanation:
Required H.C.F. = H.C.F. of 9, 12, 18, 21 = 3
L.C.M. of 10, 25, 35, 40 1400
Discussion:
29 comments Page 2 of 3.

Dillip said:   9 years ago
Actually, the answer is showing 3/2800. That's why getting confused. I also got the result 3/1400.

Gopal said:   7 years ago
For the same question instead of hcf if LCM was asked what will be the answer? Please solve it.

Vani varma said:   1 decade ago
@manasa

5 10 25 35 40
2 2 5 7 8
1 5 7 4

lcm = 5*2*1*5*7*4 = 1400

Sanidhya said:   8 years ago
Why isn't the answer 3/5 as 3/5 divides all numbers and it is also higher than 3/1400?
(1)

Rohit said:   5 years ago
I got lcm 2800 but here it is 1400. Please anyone explain this in detail.
(5)

Manasa said:   1 decade ago
How we get 1400 in the lcm part? Please can any one explain ?

Rajesh said:   1 decade ago
Can anyone explain, how this method give H.C.F?

Lalu said:   9 years ago
Thats long process, tell me short cut method.

Rahul dhamala said:   7 years ago
I am not getting the answer. Please explain.
(3)

Lateef said:   8 years ago
Agree @Sanidhya.

Can anyone explain us?
(1)


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