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Subjects
Class 10MathematicsReal NumbersPrime FactorisationEasyLevel 7
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What is the prime factorisation of 81?

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Answer and explanation

Correct answer: (3^4)

Step 1: Divide 81 repeatedly by 3. Step 2: Four factors of 3 give (81=3^4). Step 3: 9 and 27 are composite, so write the power of 3 in final prime form.

Related tags

Prime-FactorisationPower-Of-ThreeEasy

Frequently asked questions

What is the correct answer to this question?

(3^4)

Why is this the correct answer?

Step 1: Divide 81 repeatedly by 3. Step 2: Four factors of 3 give (81=3^4). Step 3: 9 and 27 are composite, so write the power of 3 in final prime form.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Prime Factorisation.

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