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LCM and HCF of two numbers are 140 and 5 respectively. If one of the numbers is 35, then find the other number.
Question

LCM and HCF of two numbers are 140 and 5 respectively. If one of the numbers is 35, then find the other number.

A.

23

B.

19

C.

22

D.

20

Correct option is D

Given:

LCM of the two numbers = 140

HCF of the two numbers = 5

One of the numbers = 35

Formula Used:

LCM × HCF = a × b

Solution:

Substitute the given values into the formula:

140 × 5 = 35 × x

700 = 35 × x

x = 70035\frac{700}{35}​ = 20

Thus, the other number is 20.

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