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Which option is an example of an irrational number?

Answer and explanation

Correct answer: 0.4141141114…

An irrational number cannot be expressed as a ratio of two integers and has a decimal expansion that is non-terminating and non-repeating. Option C, 0.4141141114…, is intended to show a decimal whose digits continue indefinitely without a fixed repeating block, so it is irrational. Option A displays a repeating block, 82, and is therefore rational; it can be written as a fraction. Option B is already a ratio of integers and is rational. Option D is terminating and can be expressed as 3625/1000, which reduces to a rational number. The slash-separated presentation in the options is slightly unusual, but the deciding property is the decimal pattern of the stated number.

Related tags

Number-SystemsIrrational-NumbersDecimal-ExpansionIrrational NumbersNumber SystemsMathematicsClass 9 Mcq

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