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The product of two consecutive positive even numbers is 224. Which numbers are they?

Answer and explanation

Correct answer: 14 and 16

Let the first number be x. The consecutive even numbers are then x and x+2. Thus, x(x+2)=224, or x²+2x−224=0. Factoring gives (x−14)(x+16)=0, so x=14 or x=−16. Since the numbers must be positive, x=14 and the next number is 16. Therefore, the correct answer is 14 and 16. Exam tip: consecutive even numbers differ by 2, not by 1.

Related tags

Quadratic EquationsConsecutive Even NumbersWord ProblemsPositive IntegersFactorisationWord Problems And ApplicationsMathematicsClass 10 Mcq

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