Insert an irrational number between the following.

Insert an irrational number between the following.

(i) 1/3 and ½
(ii) -2/5 and ½
(iii) 0 and 0.1

Solution:

(i) One irrational number between 1/3 and ½
Rational and Irrational Numbers Class 9 ICSE ML Aggarwal img 39
½ = 0.5
So there are infinite irrational numbers between 1/3 and ½.
One irrational number among them can be 0.4040040004…
(ii) One irrational number between -2/5 and ½
Rational and Irrational Numbers Class 9 ICSE ML Aggarwal img 40
½ = 0.5
So there are infinite irrational numbers between -2/5 and ½.
One irrational number among them can be 0.1010010001…
(iii) One irrational number between 0 and 0.1
There are infinite irrational numbers between 0 and 1.
One irrational number among them can be 0.06006000600006…

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