Chapter 1 Number System- MCQ Online Test 3 Class 9 Maths
1. Which of the following is a rational number?
a.2√3
b. 0
c. 1+√3
d. π
2. Find the value of xa-b × xb-c× x c-a?
a. 2
b. 6
c. 5
d. 1
3. Find the rational number not lying between -1/5 and -2/5?
a. 0
b. -3/10
c. -7/25
d. -1/4
4. If a = 2, b = 3, then find the value of (ab + ba)-1
a. 5/17
b. 3/17
c. 1/17
d. 5/11
5. Which of the following is an irrational number?
a. 
b. 
c. 
d. 
6. Every rational number is
a. A real number
b. A natural number
c. A whole number
d. An integer
7. Find √8 + 2√32 – 5√2
a. √8
b. √32
c. 5√2
d. √2
8. Find the value of321/5 + (-7)0 + 641/2
a. 15
b. 11
c. 16
d. 19
9. The decimal representation of a rational number is
a. Always terminating
b. Either terminating or repeating
c. Always non-terminating
d. Either terminating or non-repeating
10. Find the decimal form of 5/11?
a. 
b. 0.11
c. 0.58
d. 0.239
Chapter - 1 Number Systems Quiz-3 | Math Class 9th
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Question 1 of 10
1. Question
Which of the following is a rational number?
Correct
0 is an integer and all integers are rational numbers.
Incorrect
0 is an integer and all integers are rational numbers.
-
Question 2 of 10
2. Question
Find the value of xa-b × xb-c × xc-a?
Correct
xa-b × xb-c × xc-a
Base is common, so we can add the power.
xa−b+b−c+c−a
x0 = 1Incorrect
xa-b × xb-c × xc-a
Base is common, so we can add the power.
xa−b+b−c+c−a
x0 = 1 -
Question 3 of 10
3. Question
Find the rational number not lying between
?Correct
Zero is greater than both numbers. So, it will not lie between both these numbers which are of negative value.
Incorrect
Zero is greater than both numbers. So, it will not lie between both these numbers which are of negative value.
-
Question 4 of 10
4. Question
If a = 2, b = 3, then find the value of
?Correct
Incorrect
-
Question 5 of 10
5. Question
Which of the following is an irrational number?
Correct
This number is non-repeating decimal and also can’t be expressed in the form of p/q. So, it is an irrational number.Incorrect
This number is non-repeating decimal and also can’t be expressed in the form of p/q. So, it is an irrational number. -
Question 6 of 10
6. Question
Every rational number is
Correct
Every Rational number (1, 4.5, 10, 1/2, -27, 75/5, 0) is a Real number.
However, not every Real number, is a Rational number.
Although some numbers that appear to be irrational are actually rational because they can be reduced i.e.
Incorrect
Every Rational number (1, 4.5, 10, 1/2, -27, 75/5, 0) is a Real number.
However, not every Real number, is a Rational number.
Although some numbers that appear to be irrational are actually rational because they can be reduced i.e. -
Question 7 of 10
7. Question
Find
Correct
Incorrect
-
Question 8 of 10
8. Question
Find the value of
Correct
Incorrect
-
Question 9 of 10
9. Question
The decimal representation of a rational number is
Correct
Rational numbers can also be represented in decimal forms rather than representing in fractions. They can easily be represented as decimals by just dividing numerator ‘p’ by denominator ‘q’ (as rational numbers is in the form of p/q).
Therefore, A rational number can be expressed as a terminating or repeating decimals.
For example:
5/2 = 2.5
2/8 = 0.25
7 = 7.0, etc., are rational numbers which are terminating decimals.Incorrect
Rational numbers can also be represented in decimal forms rather than representing in fractions. They can easily be represented as decimals by just dividing numerator ‘p’ by denominator ‘q’ (as rational numbers is in the form of p/q).
Therefore, A rational number can be expressed as a terminating or repeating decimals.
For example:
5/2 = 2.5
2/8 = 0.25
7 = 7.0, etc., are rational numbers which are terminating decimals. -
Question 10 of 10
10. Question
Find the decimal form of 5/11?
Correct
Incorrect