Q. 7

Which one of the following is an irrational number?
A. π

B.

C.

D.

Answer :

Option A is correct since π = 3.141592… i.e. the decimal expansion is non-terminating and non-recurring.


Option B is incorrect because = ±3 and it is an integer (and hence a rational number, Integers Rational Numbers).


Option C is incorrect as it is expressed in the form (p = 1 and q = 4) and is a rational number (by definition, q≠0).


Option D is incorrect as it is expressed in the form (p = 1 and q = 5) and is a rational number (by definition, q≠0).


Hence, option A is correct.

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