- Natural and Whole Number
- |
- Integers
- |
- Rational and Irrational Numbers
- |
- Real Numbers
- |
- Laws of exponents
- |
- What is Number Line
- |
- successive Magnification

In this page we have *Class 9 Maths NCERT Solutions Chapter 1 Number System * for
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Is zero a rational number? Can you write it in the form p/q

, where

Yes. Zero is a rational number as it can be represented as 0/1 or 0/2…

Find six rational numbers between 3 and 4.

The six rational numbers

3.1 , 3.2, 3.3, 3.4, 3.5, 3.6

Find five rational numbers between 3/5 and 4/5

We need to find five rational numbers

So we multiply the denominator and numerator by (5+1) both the numbers

3/5= 18/30

4/5=24/30

So rational numbers will be in increasing order

19/30

20/30

21/30

22/30

23/30

State whether the following statements are true or false. Give reasons for your answers.

(i) Every natural number is a whole number.

(ii) Every integer is a whole number.

(iii) Every rational number is a whole number

(i) True; since the collection of whole numbers contains all natural numbers.

(ii) False; as integers may be negative but whole numbers are positive. For example: −3 is an integer but not a whole number.

(iii) False; as rational numbers may be fractional but whole numbers may not be

Download this assignment as pdf

Given below are the links of some of the reference books for class 9 Math.

- Mathematics for Class 9 by R D Sharma One of the best book for studying class 9 level mathematics. It has lot of problems to be solved.
- Secondary School Mathematics for Class 9 by R S Aggarwal This is also as good as R.D. Sharma. Either this or the book by R.D. Sharma will do. I find book R.S. Aggarwal little bit more challenging than the one by R.D. Sharma.
- Pearson IIT Foundation Series - Maths - Class 9 Buy this book if you want to challenge yourself further and want to prepare for JEE foundation.
- Pearson IIT Foundation Physics, Chemistry & Maths combo for Class 9 Only buy if you are prepared to study extra topics and want to take your studies a step further. You might need help to understand topics in these books.

You can use above books for extra knowledge and practicing different questions.

Class 9 Maths Class 9 Science

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