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If Riya's age is (a) years, what will be her age after (4) years?
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Answer and explanation
Correct answer: \(a+4\)
To find an age after 4 years, add 4 to the present age. Therefore, Riya’s age will be \(a+4\) years. The expression \(a-4\) represents her age 4 years earlier, so it is incorrect. Exam tip: use addition for “after” and subtraction for “before.”
Frequently asked questions
What is the correct answer to this question?
\(a+4\)
Why is this the correct answer?
To find an age after 4 years, add 4 to the present age. Therefore, Riya’s age will be \(a+4\) years. The expression \(a-4\) represents her age 4 years earlier, so it is incorrect. Exam tip: use addition for “after” and subtraction for “before.”
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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