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What type of number is the decimal 0.333…?

Answer and explanation

Correct answer: Rational

The three dots indicate that the digit 3 repeats indefinitely: 0.333… = 0.333333… . Every repeating decimal represents a rational number because it can be converted into a fraction. For example, let x = 0.333…; then 10x = 3.333…, and subtracting gives 9x = 3, so x = 3/9 = 1/3. Therefore option B is correct. It is not irrational because its decimal digits repeat, and it is not an integer or natural number because 1/3 lies between 0 and 1. The important distinction is that non-terminating decimals may be rational when they repeat, or irrational when they do not repeat.

Related tags

Rational NumbersRecurring DecimalsNumber SystemsIrrational NumbersMathematicsClass 9 Mcq

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