Advanced MathMediumConsecutive odd integers from a product
Advanced Math practice question
The product of two consecutive odd positive integers is 143. What is their sum?
Answer: 24
n(n + 2) = 143 gives n² + 2n − 143 = (n + 13)(n − 11) = 0, n = 11. The integers are 11 and 13; their sum is 24.
Common wrong answers
- If you answered 11
- 11 is the smaller integer.
- If you answered 13
- 13 is the larger integer.
- If you answered 143
- 143 is the product.
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