1.Which of the following is an irrational number?
a. 2.718
b. 2.717
c. 2.717171717171………
d. 2.7171171117………
2. Every rational number is which of the following?
a. An integer
b. A whole number
c. A real number
d. A natural number
3. What is the decimal representation of an irrational number?
a. Always terminating
b. Always nonterminating
c. Neither terminating nor repeating
d. Repeating
4. The sum of two irrational numbers is
a. Always an integer
b. Always rational
c. Always irrational
d. Either irrational or rational
5. Between any two rational numbers there
a. Is no rational number
b. Is no irrational number
c. Are exactly two rational numbers
d. Are many rational number
6. Find rational number between √3 and√5?
a. 3.5
b. 2.1
c. 1.5
d. 4.8
7. What is a number which can neither be expressed as a terminating decimal nor as a repeating decimal?
a. An irrational number
b. A whole number
c. An integer
d. A rational number
8. Every real number is
a. Irrational
b. Neither rational nor irrational
c. Rational
d. Either rational or irrational
9. What is the decimal form of2/11?
a. 0.18
b. 0.01823
c. 0.018
d.
10. If ‘m’ is a positive integer which is not a perfect square, then find the value of √m?
a. A natural number
b. An irrational number
c. An integer
d. A rational number
Chapter  1 Number Systems Quiz1  Math Class 9th
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Question 1 of 10
1. Question
Which of the following is an irrational number?
Correct
An irrational number in decimal form goes on forever without repeating the numbers after decimal(a nonrepeating, nonterminating decimal
Incorrect
An irrational number in decimal form goes on forever without repeating the numbers after decimal(a nonrepeating, nonterminating decimal

Question 2 of 10
2. Question
Every rational number is which of the following?
Correct
Real numbers are the numbers that can be placed on number line
And rational number can be placed on number line so all rational numbers are real number.Incorrect
Real numbers are the numbers that can be placed on number line
And rational number can be placed on number line so all rational numbers are real number. 
Question 3 of 10
3. Question
What is the decimal representation of an irrational number?
Correct
An irrational number cannot be written in the form of p/q
And decimal representation of it is neither terminating nor repeating.Incorrect
An irrational number cannot be written in the form of p/q
And decimal representation of it is neither terminating nor repeating. 
Question 4 of 10
4. Question
The sum of two irrational numbers is
Correct
The sum of two irrational numbers, in some cases, will be irrational. However, if the irrational parts of the numbers have a zero sum (cancel each other out because of opposite sign), the sum will be rational.
Incorrect
The sum of two irrational numbers, in some cases, will be irrational. However, if the irrational parts of the numbers have a zero sum (cancel each other out because of opposite sign), the sum will be rational.

Question 5 of 10
5. Question
Between any two rational numbers there
Correct
Between any two rational number there are many rational number,
Example — 4 and 8
We have 5, 6, 7, 7.5…….. And many moreIncorrect
Between any two rational number there are many rational number,
Example — 4 and 8
We have 5, 6, 7, 7.5…….. And many more 
Question 6 of 10
6. Question
Find rational number between √3 and√5?
Correct
√3 = 1.73…..
√5 = 2.236…
(1.73+2.24)/2=2.1
2.1 lies between this two rational numbers.Incorrect
√3 = 1.73…..
√5 = 2.236…
(1.73+2.24)/2=2.1
2.1 lies between this two rational numbers. 
Question 7 of 10
7. Question
What is a number which can neither be expressed as a terminating decimal nor as a repeating decimal?
Correct
An irrational number cannot be written in the form of p/q.
Irrational number can neither be expressed as terminating decimal nor as repeating decimal.Incorrect
An irrational number cannot be written in the form of p/q.
Irrational number can neither be expressed as terminating decimal nor as repeating decimal. 
Question 8 of 10
8. Question
Every real number is
Correct
Real numbers are either rational or be irrational. You can write numbers in a fraction form using two whole numbers (denominator ≠ 0) which will be a rational number. Or if you can’t, then it will be a irrational number.
Incorrect
Real numbers are either rational or be irrational. You can write numbers in a fraction form using two whole numbers (denominator ≠ 0) which will be a rational number. Or if you can’t, then it will be a irrational number.

Question 9 of 10
9. Question
What is the decimal form of2/11?
Correct
When we divide 2 by 11
We have 0.181818……..Here 18 is repeating after decimal so we can write it as
Incorrect
When we divide 2 by 11
We have 0.181818……..Here 18 is repeating after decimal so we can write it as

Question 10 of 10
10. Question
If ‘m’ is a positive integer which is not a perfect square, then find the value of √m?
Correct
In√m, if m is not perfect square, then the value of √m will be m^{½}.
Example,√3 where 3 is not a perfect square then, √3 = 3^{½}, which is irrational
But if it is perfect square then value of √m = some integer
Example – √4 = 2Incorrect
In√m, if m is not perfect square, then the value of √m will be m^{½}.
Example,√3 where 3 is not a perfect square then, √3 = 3^{½}, which is irrational
But if it is perfect square then value of √m = some integer
Example – √4 = 2