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# LCM and HCF of two numbers is equal to 75 and 5 . If one number is 15, find the other one.

- 15
- 20
- 30
- 25

## The correct answer is: 25

### LCM×HCF = a × b

75 × 5 = 15× b

375 = 15 × b

= b

25 = b

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