Olete.in – MCQs, Mock Tests & Government Job Prep | ICSE 9 ICSE Class: 9 Rational and Irrational Numbers

Are the square roots of all positive integers real numbers?

1. Yes
2. None of these
3. Can not determine
4. No

✅ Correct Answer: 1

Classify the following numbers as rational or irrational : sqrt{144} 144 

1. None of these
2. Can not determine
3. Rational
4. Irrational

✅ Correct Answer: 3

Classify the following numbers as rational or irrational : sqrt{25} 25

1. None of these
2. Irrational
3. Can not determine
4. Rational

✅ Correct Answer: 4

State whether the following statements are true or false: Every irrational number is a real number.

1. None of these
2. True
3. Can not determine
4. False

✅ Correct Answer: 2

Are the square roots of all positive integers irrational?

1. Can not determine
2. No
3. None of these
4. Yes

✅ Correct Answer: 2

Give an example of the square root of a number that is a rational number.

1. 20
2. 15
3. 25
4. 5

✅ Correct Answer: 3

Classify the following numbers as rational or irrational : sqrt{22} 22 

1. Irrational
2. Rational
3. Can not determine
4. None of these

✅ Correct Answer: 1

Classify the following numbers as rational or irrational : sqrt{23} 23

1. Rational
2. Irrational
3. Can not determine
4. None of These

✅ Correct Answer: 2

Classify the following numbers as rational or irrational : 0.765716124276

1. Irrational
2. Can not determine
3. Rational
4. None of These

✅ Correct Answer: 3

Classify the following numbers as rational or irrational : 0.377675220922

1. Rational
2. Can not determine
3. None of these
4. Irrational

✅ Correct Answer: 1

Classify the following numbers as rational or irrational : 0.555555...

1. Irrational
2. Can not determine
3. None of these
4. Rational

✅ Correct Answer: 1

Classify the following numbers as rational or irrational : 0.555555...

1. Irrational
2. Can not determine
3. Rational
4. None of these

✅ Correct Answer: 3

A number ‘r’ is called a _______ if it can be written in the form p/q, where p and q are integers and q not equal to 0. a) Irrational Number b) Rational Number c) None of these d) A number ‘r’ is called a _______ if it can be written in the form p/q, where p and q are integers and q not equal to 0.

1. Irrational Number
2. Rational Number
3. None of these
4. Real Number

✅ Correct Answer: 2

Every real number is represented by a unique point on the _____

1. Number line
2. None of these
3. Irrational Number
4. Rational Number

✅ Correct Answer: 1

Every point on the number line represents a unique ____.

1. None of these
2. Real Number
3. Irrational Number
4. Rational Number

✅ Correct Answer: 2