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Which of the following expressions has \(5ab\) as its highest common factor (HCF)?
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Answer and explanation
Correct answer: \(10a^2b+15ab^2\)
In \(10a^2b\) and \(15ab^2\), 5, \(a\), and \(b\) are common, so the HCF is \(5ab\). Option D has HCF \(6ab\). Exam tip: use the smallest power of every common variable.
Frequently asked questions
What is the correct answer to this question?
\(10a^2b+15ab^2\)
Why is this the correct answer?
In \(10a^2b\) and \(15ab^2\), 5, \(a\), and \(b\) are common, so the HCF is \(5ab\). Option D has HCF \(6ab\). Exam tip: use the smallest power of every common variable.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Factorisation.
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