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If a number is not divisible by (3), then its square is surely not divisible by what?

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Answer and explanation

Correct answer: (3)

Prime factor (3) appears in the square only when it appears in the number. This supports the proof of (\sqrt{3}).

Related tags

Number-SystemsDivisibility-By-3Basic-Fact

Frequently asked questions

What is the correct answer to this question?

(3)

Why is this the correct answer?

Prime factor (3) appears in the square only when it appears in the number. This supports the proof of (\sqrt{3}).

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Proof of irrationality of square root 2 and square root 3.

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