Question

Select irrational no. from the following: a)1.2525... b)1.21555... c)1.2505005... d)1.25555...

Answer 1

Answer will be
C. 1.2505005

Because it is non repeating or non recurring and others are repeating.

Answer 2

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Hey your answer is option ( c ) 1.2505005....

Explanation : a ) 1.2525.....

In this option you can see that 25 is being repeated .So, its decimal expansion is  recurring .Hence, it is a rational number.

b) 1.21555......

It is a rational number as its decimal expansion is recurring.5 is being repeated.


c ) 1.2505005......

It is an irrational number as its decimal expansion is non - terminating and non-recurring.

d ) 1.2555555.....

It is a rational number as its decimal expansion is recurring.

                            
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