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Which statement is true for an irrational number?

Answer and explanation

Correct answer: It cannot be written as p/q

The governing concept is the definition of an irrational number. An irrational number cannot be expressed as p/q, where p and q are integers and q is non-zero. Therefore, option D is correct. In decimal form, an irrational number has an expansion that is non-terminating and non-repeating; hence option A is false because terminating decimals are rational, and option B is false because repeating decimals are also rational. Option C gives the defining property of rational numbers, not irrational numbers. For example, √2 is irrational because no ratio of integers represents it, while 3/8 is rational because it is already in p/q form.

Related tags

Number-SystemsIrrational-NumbersDecimal-RepresentationIrrational NumbersNumber SystemsMathematicsClass 9 Mcq

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