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What type of real number is 0.625?

Answer and explanation

Correct answer: A rational number

The governing concept is decimal classification. The decimal 0.625 terminates after three digits, so it can be converted into a fraction: 0.625 = 625/1000. Dividing numerator and denominator by 125 gives 5/8. Since 5 and 8 are integers and the denominator is non-zero, 0.625 is rational. It is also real because every rational number belongs to the real-number system. Therefore option B is correct. It is not irrational, since irrational decimals are non-terminating and non-repeating. It is not non-real or merely imaginary; the given finite decimal has an ordinary position on the real number line.

Related tags

Real NumbersTerminating DecimalRational NumbersNumber SystemsMathematicsClass 9 Mcq

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