Advanced MathEasy–MediumSmaller of two numbers from product and difference
Advanced Math practice question
Two positive numbers differ by 2 and have a product of 48. What is the smaller number?
Answer: 6
n(n + 2) = 48 gives n² + 2n − 48 = (n + 8)(n − 6) = 0, so n = 6.
Common wrong answers
- If you answered 4
- 4 gives 4 × 6 = 24.
- If you answered 8
- 8 is the larger number.
- If you answered 24
- 24 halves 48.
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