CBSE Class 9th NCERT Solution: Mathematics

Get Study Material, Solved Question Papers, Syllabus, Sample Papers, Experts video, Online Test And much more.

Chapter 1Number System

Exercise: 1.1

Question 1: Is zero a rational number? Can you write it in the form pq

, where p and q are

integers and 0?q

Solution: Yes, we may rewrite 0 as 01

(where 0 and 1 are integers and q=1 which is not equal to

zero).

Question 2: Find six rational numbers between 3 and 4.

Solution: There can be infinitely many rational between 3 and 4, one way to take them is

213

7 and 284

7 .

First rational number between 3 and 4

1

21 28 49+21 28 77 7 7= (rationalnumber between and = = =

7 7 2 2 221 7 28