which of the following is NOT a rational number?

\(\sqrt {{3^2} + {4^2},} \sqrt {12.96,} \sqrt {125,\;} and\;\sqrt {900} \)

Question

Question

This question was previously asked in

NTPC CBT-I (Held On: 5 Jan 2021 Shift 1)

Answer 1

Calculation:

Rational number - A number which is in the form of p/q

According to the given option

⇒ \(\sqrt {{3^2} + {4^2}} \) = √25 = 5 is a rational number

⇒ \( √ {12.96} \) = 3.6 is a rational number

⇒ √125 = 5√5 is not a rational number

⇒ √900 = 30 is a rational number

∴ √125 is not a rational number

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