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What type of real number is the decimal \(3.454545\ldots\)?

Answer and explanation

Correct answer: Rational number

The block 45 repeats after the decimal point, so this is a recurring decimal. Every recurring decimal is rational; in fact, \(3.454545\ldots=3+\frac{45}{99}=\frac{38}{11}\). It is not an integer because \(\frac{38}{11}\) is not a whole number. Exam tip: Both terminating and recurring decimals are rational numbers.

Related tags

Real NumbersRepeating DecimalRational NumbersNumber SystemsMathematicsClass 9 Mcq

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