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If the HCF of two numbers is 6 and their LCM is 120, one such pair of numbers is:
1. 24, 30
2. 18, 40
3. 12, 60
4. 12, 40

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Correct Answer - Option 1 : 24, 30

Given :

HCF = 6 , LCM = 120 

Concept : Product of two number = LCM × HCF

The number must be = 6X , 6Y

6 × 120 = (6X) (6Y)

(XY) = 20 = 5 × 4

hence 

The number must be = 6X , 6Y

so the number is = 6 × 5 , 6 × 4 = ( 30,24)

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