BA LLB Banaras Hindu University 2017 Solved Paper

Question : 114 of 170

Marks: +1, -0

HCF and LCM of two numbers are 7 and 140 respectively. If the numbers are between 20 and 45 , the sum of the numbers, is

Solution:

Let numbers are

7 x

and

7 y

.
Then, LCM

=7 x y=7 x y=140

⇒ \;\; x y=20

i.e.

(x, y)=(4,5)

Required value

=(7 × 4,7 × 5)

\;\; =28+35=63

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