Aug 25 2013 irrational number A number which can not be expressed as the ratio of two integers is called irrational number. Example √2 A non terminating and non repeating decimal is also called a rational number. Example 0.10100100100001………………………….. π About π The exact value of π is not 22 / 7. 22 / 7 is the approximate value of π. Similarly 3.14 is not an exact value of π. Share this:Click to share on Facebook (Opens in new window)Click to email this to a friend (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Like this:Like Loading...