NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.1
Ex 1.1 Class 9 Maths Question 1.
Is zero a rational number? Can you write it in the form
, where p and q are integers and q ≠ 0?
Solution:
Yes, zero is a rational number.
Zero can be written in any of the following forms :

Thus, 0 can be written as
, where p = 0 and q is any non-zero integer.
Hence, 0 is a rational number.
Is zero a rational number? Can you write it in the form
Solution:
Yes, zero is a rational number.
Zero can be written in any of the following forms :
Thus, 0 can be written as
Hence, 0 is a rational number.
Ex 1.1 Class 9 Maths Question 2.
Find six rational numbers between 3 and 4.
Solution:
The rational numbers between 3 and 4.


Ex 1.1 Class 9 Maths Question 3.
Find five rational numbers between
and
.
Solution:
Since we want 5 rational numbers between
and
, so we write

Find six rational numbers between 3 and 4.
Solution:
The rational numbers between 3 and 4.


Ex 1.1 Class 9 Maths Question 3.
Find five rational numbers between
Solution:
Since we want 5 rational numbers between

Ex 1.1 Class 9 Maths Question 4.
State whether the following statements are true or false. Give reasons for your answers.
State whether the following statements are true or false. Give reasons for your answers.
- Every natural number is a whole number.
- Every integer is a whole number.
- Every rational number is a whole number.
Solution:
(1) True: Every natural number lies in the collection of whole numbers.
(2) False: -3 is not a whole number.
(3) False:
is not a whole number.
(1) True: Every natural number lies in the collection of whole numbers.
(2) False: -3 is not a whole number.
(3) False:
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