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

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-FactProof Of Irrationality Of Square Root 2 And Square Root 3Number SystemsMathematicsClass 9 Mcq

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