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Subjects
Class 9MathematicsNumber SystemsExponentsHardLevel 5
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If (c^2=1681) then what is the positive value of (c)?

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Answer and explanation

Correct answer: 41

Since (41)^2 = 41 × 41 = 1681, the possible values of c are 41 and −41. The question asks for the positive value, so the correct answer is 41. Exam tip: When the square of a number is given, take its square root and choose the positive sign when a positive value is required.

Related tags

Number SystemsExponentsSquare RootsQuadratic Equations

Frequently asked questions

What is the correct answer to this question?

41

Why is this the correct answer?

Since (41)^2 = 41 × 41 = 1681, the possible values of c are 41 and −41. The question asks for the positive value, so the correct answer is 41. Exam tip: When the square of a number is given, take its square root and choose the positive sign when a positive value is required.

Which subject and chapter does this question cover?

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

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