HCF & LCM · Question 15 · Hard
The sum of two numbers is 528 and their HCF is 33. How many such pairs of numbers are possible?
- 4
- 2
- 3
- 5
Answer and explanation
Answer: A. 4
Explanation: Let the numbers be 33a and 33b with a, b co-prime and a + b = 16. Co-prime pairs: (1, 15), (3, 13), (5, 11), (7, 9), so there are 4 pairs.
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