Quiz about Number System

Question 1

The decimal expansion of the number $$\sqrt{2}$$ is

Accepted Answer

Covalent bond

Answer

$$non-terminating \quad recurring$$

Answer

$$ a \quad finite \quad decimal $$

Answer

$$non-terminating\quad and \quad  non-recurring$$

Answer

$$None \quad of \quad these$$

Question 2

Simplify $$:(5+\sqrt{5})(5-\sqrt{5})$$

Accepted Answer

Covalent bond

Answer

$$27$$

Answer

$$22$$

Answer

$$20$$

Answer

$$24$$

Question 3

$$2 \sqrt{3}+\sqrt{3}$$ is equal to

Accepted Answer

Covalent bond

Answer

$$3 \sqrt{3}$$

Answer

$$ 6 $$

Answer

$$4 \sqrt{6}$$

Answer

$$2 \sqrt{6}$$

Question 4

Calculate the irrational number between $$2$$ and $$2.5 .$$

Accepted Answer

Covalent bond

Answer

$$\sqrt{8}$$

Answer

$$\sqrt{11}$$

Answer

$$\sqrt{10}$$

Answer

$$\sqrt{5}$$

Question 5

Is the product of two irrational numbers always an irrational number ?

Accepted Answer

Covalent bond

Answer

$$Yes$$

Answer

$$No$$

Number System Cbse Class 9 Maths Problems and Solutions