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Subjects
Class 9MathematicsNumber SystemsExponentsEasyLevel 7
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What is the value of (21^2)?

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Answer and explanation

Correct answer: 441

Here, \(21^2\) means \(21\times 21\). Therefore, \(21\times 21=441\), so 441 is correct. 421 is not the square of 21. Exam tip: To find a square, multiply the number by itself.

Related tags

ExponentsSquaresNumber SystemsInteger Multiplication

Frequently asked questions

What is the correct answer to this question?

441

Why is this the correct answer?

Here, \(21^2\) means \(21\times 21\). Therefore, \(21\times 21=441\), so 441 is correct. 421 is not the square of 21. Exam tip: To find a square, multiply the number by itself.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.

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