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The sum of the ages of two people is 30 years and their product is 216. Find their ages.

Answer and explanation

Correct answer: 12 years and 18 years

Let one person’s age be x years; then the other person’s age is 30 − x years. Using the product, x(30 − x) = 216, which gives x² − 30x + 216 = 0. Factoring, (x − 12)(x − 18) = 0, so the ages are 12 years and 18 years. Option B has the correct sum, but 11 × 19 = 209, not 216. Exam tip: in such questions, verify both the sum and the product for the options.

Related tags

Quadratic EquationsAge ProblemsWord ProblemsFactorisationWord Problems And ApplicationsMathematicsClass 10 Mcq

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