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Which of the following is not rational number?(a) 8/9(b) 5/7(c) -3/2(d) √2I have been asked this question by my school teacher while I was bunking the class.The above asked question is from Number Systems Basics in section Number Systems of Mathematics – Class 9

Answer»

The CORRECT answer is (d) √2

To explain: A number is SAID to be RATIONAL number if it can be represented by p/q where p and q are integers and q≠0 but √2 = √2/1 and √2 = 1.414213… which is not integer HENCE, √2 is not rational number.



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