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SSC Selection Post 2025 PYQ — Question 45

SSC Selection Post - Higher Secondary Level - 2nd August 2025 - Shift 2 • Quantitative Aptitude • Q45

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Which of the following square roots is irrational?

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Correct answer: C

Explanation

√64 = 8 (Rational)

√121 = 11 (Rational)

√169 = 13 (Rational)

√51 is not a perfect square; therefore, √51 is irrational.