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 |
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:
31 comments Page 2 of 4.
Amit said:
9 years ago
Answer Should be 3/2800.
Because,
H.C.F of 9, 12, 18, 21 is 3.
L.C.M of 10, 25, 35, 40 is 2800.
So, the answer is 3/2800.
Because,
H.C.F of 9, 12, 18, 21 is 3.
L.C.M of 10, 25, 35, 40 is 2800.
So, the answer is 3/2800.
Dillip said:
10 years ago
Actually, the answer is showing 3/2800. That's why getting confused. I also got the result 3/1400.
Zafar khan said:
1 decade ago
H.C.F= H.C.F of Numerators/L.C.M of Denominators
L.C.M= L.C.M of Numerators/H.C.F of Denominators
L.C.M= L.C.M of Numerators/H.C.F of Denominators
Gopal said:
8 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
5 10 25 35 40
2 2 5 7 8
1 5 7 4
lcm = 5*2*1*5*7*4 = 1400
Sanidhya said:
9 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:
6 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:
10 years ago
Thats long process, tell me short cut method.
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