NCERT solution class 9 chapter 1 Number Systems exercise 1.1 mathematics

EXERCISE 1.1


Page No 5:

Question 1:

Is zero a rational number? Can you write it in the form, where p and are integers and q ≠ 0?

Answer:

Yes. Zero is a rational number as it can be represented asetc.


Question 2:

Find six rational numbers between 3 and 4.

Answer:

There are infinite rational numbers in between 3 and 4.

3 and 4 can be represented asrespectively.

Therefore, rational numbers between 3 and 4 are


Question 3:

Find five rational numbers between.

Answer:

There are infinite rational numbers between.

Therefore, rational numbers betweenare


Question 4:

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.

Answer:

(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. For example:  is a rational number but not a whole number.


 

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