# NCERT Mathematics Class 9 Exemplar Ch 1 Number Systems Part 1

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**Exercise 1.1**

Q.1. Every rational number is

(A) A natural number

(B) An integer

(C) A real number

(D) A whole number

Answer: C

Q.2. Between two rational numbers

(A) There is no rational number

(B) There is exactly one rational number

(C) There are infinitely many rational numbers

(D) There are only rational numbers and no irrational numbers

Answer: C

Q.3. Decimal representation of a rational number cannot be

(A) Terminating

(B) non-terminating

(C) non-terminating repeating

(D) non-terminating non-repeating

Answer: D

Q.4. The product of any two irrational numbers is

(A) Always an irrational number

(B) Always a rational number

(C) Always an integer

(D) Sometimes rational, sometimes irrational.

Answer: D

Q.5. The decimal expansion of the number √2 is

(A) A finite decimal

(B)

(C) non-terminating recurring

(D) non-terminating non-recurring.

Answer: D

Q.6. Which of the following is irrational?

(A)

(B)

(C)

(D)

Answer: C

Q.7. Which of the following is irrational?

(A)

(B)

(C)

(D)

Answer: D