Looking for accurate SEBA Class 9 Maths Exercise 1.1 (Number Systems) textual solutions for the 2026–27 academic year? Access complete step-by-step solutions covering rational numbers, expressing zero as a rational number (p/q form), finding rational numbers between two given numbers using mean and equivalent fraction methods to score top marks in your annual exams.
EXERCISE 1.1
1. Is zero a rational number? Can you write it in the form p/q, where p and q are integers and q ≠ 0?
Solution:
Yes, zero is a rational number.
It can be written in the form p/q as:
0 = 0/1
Here, p = 0 and q = 1, where p and q are integers and q ≠ 0.
2. Find six rational numbers between 3 and 4.
Solution:
To find 6 rational numbers, multiply the numerator and denominator of both numbers by (6 + 1) = 7.
3 = (3 × 7) / 7 = 21/7
4 = (4 × 7) / 7 = 28/7
The six rational numbers between 21/7 and 28/7 are:
22/7, 23/7, 24/7, 25/7, 26/7, 27/7
SEBA Class 9 Maths Exercise 1.1 Solutions
3. Find five rational numbers between 3/5 and 4/5.
Solution:
To find 5 rational numbers, multiply the numerator and denominator of both numbers by (5 + 1) = 6.
3/5 = (3 × 6) / (5 × 6) = 18/30
4/5 = (4 × 6) / (5 × 6) = 24/30
The five rational numbers between 18/30 and 24/30 are:
19/30, 20/30, 21/30, 22/30, 23/30
4. State whether the following statements are true or false. Give reasons for your answers.
(i) Every natural number is a whole number.
Answer: True
Reason: The collection of whole numbers includes all natural numbers along with zero.
(ii) Every integer is a whole number.
Answer: False
Reason: Negative integers (like -2, -5) are not whole numbers.
(iii) Every rational number is a whole number.
Answer: False
Reason: Numbers like 1/2 or 3/4 are rational numbers but not whole numbers.
Class 9 Maths Chapter 1 Exercise 1.1 Question Answer SEBA 2026-27
5. Every Natural number is
(i) a Whole number
(ii) an Integer
(iii) a Rational number
(iv) a Real number
Which one of the following is correct ?
(A) Only (i)
(B) Only (i), (ii)
(C) Only (i), (ii), (iii)
(D) (i), (ii), (iii) & (iv) are all correct
Answer:
Option (D) (i), (ii), (iii) & (iv) are all correct
Number Systems Class 9 SEBA Ex 1.1 Solutions
6. Every Rational number is
Choose the correct option
(A) a Natural number
(B) a Whole number
(C) an Integer
(D) a Real number
Answer:
Option (D) a Real number
SEBA Class 9 Maths Chapter 1 Exercise 1.1 Textbook Answers
Class 9 Maths Find Rational Numbers Between Two Numbers
📐 Updated Solutions Notice: This page features complete, step-by-step SEBA Class 9 Mathematics Chapter 1 (Number Systems) Exercise 1.1 Textual Solutions updated for the 2026–27 academic session. All zero representation steps ($0 = 0/q$), fraction insertion techniques, and rational number classifications strictly follow the latest revised Assam Board (SEBA) curriculum.
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