HCF & LCM · Question 8 · Medium
Two numbers are in the ratio 3 : 4 and their LCM is 180. What is their HCF?
- 12
- 20
- 15
- 45
Answer and explanation
Answer: C. 15
Explanation: Let the numbers be 3k and 4k, so LCM = 12k = 180 and k = 15. The numbers are 45 and 60, whose HCF is 15.
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