, short answer questions, and concept-based problems from topics like real numbers, rational and irrational numbers, terminating and non-terminating decimals, and laws of exponents. Each mock test provides real-time scoring, detailed solutions, and performance analysis to help students identify their strengths and weaknesses. Take unlimited free tests, improve your accuracy, and gain confidence in the Number System chapter of Class 9 Mathematics. Perfect for exam revision, homework help, and self-assessment.

1. Let x and y be rational and irrational number, respectively. Then x + y is necessarily

 
 
 
 

2. Value of  is

 
 
 
 

3.

The value of , where  = 3.162 is

 
 
 
 

4. Simplified value of  is

 
 
 
 

5.  is equal to

 
 
 
 

6. Value of is

 
 
 
 

7. On simplifying 83 ⋅ 24, we get

 
 
 
 

8. The number 1.010010001 …… is

 
 
 
 

9.  can be written as

 
 
 
 

10. Value of (256)0.16 × (256)0.09 is

 
 
 
 

11. An irrational number lying between the numbers 0.401001000100001… and 0.404004000400004… is

 
 
 
 

12. On simplifying (3 + ) (3 − ), we get

 
 
 
 

13. The value of x, if  = 5, is

 
 
 
 

14. On simplifying , we get

 
 
 
 

15. Which of the following is equal to x?

 
 
 
 

16.

 
 
 
 

17.

 On dividing  by , we get

 
 
 
 

18. On simplifying  we get

 
 
 
 

19. The simplified form of  is

 
 
 
 

20. Simplified form of  is

 
 
 
 

21.   is equal to

 
 
 
 

22.

 
 
 
 

23. Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Sum of two irrational numbers  is rational number.
Reason (R): Sum of two irrational numbers can be rational/an irrational number.

 
 
 
 

24. Value of  is

 
 
 
 

25. Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): 0.189 is a terminating decimal.
Reason (R): A decimal in which a digit or set of digits is repeated periodically, is called a repeating or recurring decimal.

 
 
 
 

26. A rational number between  and  is

 
 
 
 

27.   is equal to

 
 
 
 

28.

It is given that m and n are two natural numbers such that mn = 32. The value of nmn is equal to
 
 
 
 

29. To rationalise the denominator of , we multiply and divide by

 
 
 
 

Question 1 of 29