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From the following numbers, which number is not a rational number?

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in Mathematics - Class 10 by (506k points)
From the following numbers, which number is not a rational number?

(a) π

(b) \(\frac {22}{7}\)

(c) \(\frac {3}{4}\)

(d) 0.666666…..

The question was posed to me during an interview.

The doubt is from Irrational and Rational Numbers topic in portion Real Numbers of Mathematics – Class 10

1 Answer

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Best answer
Right choice is (a) π

To explain: A rational number has terminating or non-terminating but repeating decimals.

In case of π, it has a non-terminating as well as non-repeating decimal.

The other three numbers have terminating or non-terminating but repeating decimal, therefore, they are rational numbers.

Hence, it is an irrational number.

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