16Hit1600
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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