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What is the prime factorisation of (81)?
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Answer and explanation
Correct answer: (3^4)
Step 1: (81=9 \times 9). Step 2: Since (9=3^2), (81=3^2 \times 3^2=3^4). Step 3: (9^2) is not final prime factorisation because (9) is not prime.
Frequently asked questions
What is the correct answer to this question?
(3^4)
Why is this the correct answer?
Step 1: (81=9 \times 9). Step 2: Since (9=3^2), (81=3^2 \times 3^2=3^4). Step 3: (9^2) is not final prime factorisation because (9) is not prime.
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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