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Which decimal expansion is non-terminating recurring?

Answer and explanation

Correct answer: \(\frac{1}{3}\)

\(\frac{1}{3}=0.333\ldots\), where the digit 3 repeats forever. Hence, its decimal expansion is non-terminating recurring. In contrast, \(\frac{1}{8}=0.125\), \(\frac{5}{2}=2.5\), and \(\frac{7}{20}=0.35\) are terminating decimals. Exam tip: In lowest form, if a denominator has a prime factor other than 2 or 5, the decimal expansion is non-terminating recurring.

Related tags

Real NumbersDecimal ExpansionRecurring DecimalsRational NumbersNumber SystemsDecimal RepresentationMathematicsClass 9 Mcq

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