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## Number Systems Class 09 Multiple Choice Test

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Number Systems Class 09 (090101)

Challenge Yourself …

1 / 10

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 nos.

2 / 10

The sum of two irrational numbers is:

(a) an irrational number

(b) a rational number

(c) neither a rational nor an irrational number

(d) either a rational or an irrational number

3 / 10

If a and b are natural numbers,

then $$(\sqrt{a}+\sqrt{b})(\sqrt{a}-\sqrt{b})$$ is:

(a) rational

(b) irrational

(c) neither rational nor irrational

(d) none of these

4 / 10

The value of  $$(343)^{-\frac{1}{3}}$$ is equal to:

(a) 7

(b) $$\frac{1}{7}$$

(c) $$\frac{1}{49}$$

(d) $$-\frac{1}{7}$$

5 / 10

6 / 10

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

7 / 10

8 / 10

The product of two irrational numbers is :

(a) a rational number

(b) an irrational number

(c) either a rational or an irrational number

(d) neither a rational nor an irrational number

9 / 10

10 / 10

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