1.

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

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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