Basic Maths for class 9th

 video lectures for basic math

practice questions

Question 1: Can we write `0` in the form of ` \frac{p}{q} `?

a. Yes

b. No

c. It cannot be explained

d. None of the above

 

Question 2: In between any two numbers there are:

a. Only one rational number

b. Many rational numbers

c. Infinite rational numbers

d. No rational number

Question 3: Every rational number is:

a. Whole number

b. Natural number

c. Integer

d. Real number

Question 4:  ` \sqrt{9} ` is a __________ number.

a. Rational

b. Irrational

c. Neither rational no irrational

d. None of the above

Question 5:  Which of the following is an irrational number?

a. `\sqrt{16}`

b. `\sqrt{\frac{12}{3}}`

c. `\sqrt{12}`

d. `\sqrt{100}`

Question 6: `3\sqrt{6}`+`4\sqrt{6}` is equal to:

a. 6`\sqrt{6}`

b.7`\sqrt{6}`

c. 4`\sqrt{12}`

d. 7`sqrt{12}`

Question 7:  `\sqrt{6}\times\sqrt{27}` is equal to:

a. 9`\sqrt{2}`

b. 3`\sqrt{3}`

c. 2`\sqrt{2}`

d. 9`\sqrt{3}`

Question 8:  Which of the following is equal to `x^{3}` ? 

a. `x^{6}`-`x^3`

b. `x^{6}\cdot x^{3}`

c. `\frac{x^6}{x^3}`

d. `\left( x^{6} \right)^3`

Question 9: Which of the following are irrational numbers?

a. `\sqrt{23}`

b. `\sqrt{225}`

c. `0.3796`

d. `7.478478`

Question 10:  The product of a rational and an irrational number is:

a) Always an integer

b) Always a rational number

c) Always an irrational number

d) Sometimes rational and sometimes irrational

Question 11: A rational number between `\sqrt{2}` and `\sqrt{3}` :

a) `1.9`

b) `\frac{\left( \sqrt{2}\cdot\sqrt{3}\right)}{2}`

c) `1.5`

d) `1.8`

Question 12: Which of the following is irrational?

a) `\sqrt{\frac{4}{9}}`

b) `\frac{\sqrt{12}}{\sqrt{3}}`

c) `\sqrt{5}`

d) `\sqrt{81}`

Question 13: `4\sqrt{5}` + `5\sqrt{5}` is equal to

a) `9\sqrt{5}`

b) `9\sqrt{10}`

c) `5\sqrt{10}`

d) `7\sqrt{5}`

Question 14:  Which of the following is irrational?

a)  `0.40140014000….`

b) `0.14`

c) `0\overline{.1416}`

d) `0.14\overline{16}`

Question 15:  In between two rational numbers there is/are:

a) Exactly one rational number

b) Infinitely many rational numbers

c) Many irrational numbers

d) Only irrational numbers

Question 16: What would be the denominator after rationalizing `\frac{7}{5\sqrt{3}-5\sqrt{2}}` ?

a) `19`

b) `20`

c) `25`

d) None of these

Question 17: Value of `256^{0.16}\times256^{0.09}`  is:

a) `4`

b) `16`

c) `64`

d) `256.25`

Answer key

Q 1 (a) Q 9 (a) Q 17 (a)

Q 2 (c) Q 10 (c)

Q 3 (d) Q 11 (c)

Q 4 (a) Q 12 (c)

Q 5 (c) Q 13 (a)

Q 6     (b) Q 14 (a)

Q 7     (a) Q 15 (b)

Q 8     (c) Q 16 (d)