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Class 10MathematicsReal NumbersPrime FactorisationEasyLevel 9

What is the correct prime factorisation of 840?

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Answer and explanation

Correct answer: (2^3\times3\times5\times7)

Step 1: Write (840=84\times10). Step 2: (84=2^2\times3\times7) and (10=2\times5), so (840=2^3\times3\times5\times7). Step 3: Break all composite factors down to primes.

Tags

prime-factorisationnumber-840easy

Frequently asked questions

What is the correct answer to this question?

(2^3\times3\times5\times7)

Why is this the correct answer?

Step 1: Write (840=84\times10). Step 2: (84=2^2\times3\times7) and (10=2\times5), so (840=2^3\times3\times5\times7). Step 3: Break all composite factors down to primes.

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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