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Class 10MathematicsReal NumbersPrime FactorisationMediumLevel 12

What is the correct prime factorisation of (245)?

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Answer and explanation

Correct answer: (5 \times 7^2)

Step 1: Write (245) as (5 \times 49). Step 2: Since (49=7^2), (245=5 \times 7^2). Step 3: Do not leave (49) in the final answer because it is not prime.

Tags

real-numbersprime-factorisation245

Frequently asked questions

What is the correct answer to this question?

(5 \times 7^2)

Why is this the correct answer?

Step 1: Write (245) as (5 \times 49). Step 2: Since (49=7^2), (245=5 \times 7^2). Step 3: Do not leave (49) in the final answer because it 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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