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UPSC CDS Math HCF and LCM of Numbers and Polynomials Questions
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Question : 1
Total: 31
HCF of two numbers is 12. Which one of the following can never be their LCM ?
[2019 CDS-II]
80
60
36
24
Validate
Solution:
Let two numbers are 12 a and 12 b. Such that
H
.
C
.
F
=
12
.
then
L
⋅
C
⋅
M
=
12
.
a
⋅
b
Here, L.C.M of these two number must be divisible by 12 . "80' is not divisible by 12, so can not be L.C.M
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