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1. If the difference between two numbers is 7 and their product is 60, then one of the two numbers must be-
- A. 4
- B. 4
- C. 4
- D. 4
Answer: Option B
Explanation:
x - y = 7; x = (y + 7)
xy = 60
or , (y + 7).y = 60
or, y² + 7y - 60 = 0
or, (y + 12) (y – 5) = 0
So, Y = - 12,5
So, the two number is 12 and 5
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