Number System · Question 11 · Medium
The product of two numbers is 1575 and their quotient is 9/7. What is their sum?
- 70
- 80
- 75
- 85
Answer and explanation
Answer: B. 80
Explanation: Let the numbers be 9k and 7k. Then 63k^2 = 1575, so k^2 = 25 and k = 5. The numbers are 45 and 35, with sum 80.
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