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Subjects
Class 9MathematicsNumber SystemsExponentsMediumLevel 5
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If (z^3=729) then what is the value of (z)?

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Answer and explanation

Correct answer: 9

Since 9 × 9 × 9 = 729, we get z = 9. The cube of 8 is 512, so 8 is not correct. Exam tip: verify a perfect cube by multiplying the number by itself three times.

Related tags

ExponentsCube RootsPerfect CubesNumber SystemsClass 9 Mathematics

Frequently asked questions

What is the correct answer to this question?

9

Why is this the correct answer?

Since 9 × 9 × 9 = 729, we get z = 9. The cube of 8 is 512, so 8 is not correct. Exam tip: verify a perfect cube by multiplying the number by itself three times.

Which subject and chapter does this question cover?

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

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