- Time Limit: You have 15 minutes to complete the quiz.
- Multiple Choice: Each question comes with several answer options.
- One Correct Answer: Only one option is correct for each question.
- No Negative Marking: There is no penalty for wrong answers.
Class 9 Maths Chapter 1 Real Numbers Quiz Questions
Welcome to the quiz 2 on Chapter 1 – Real Numbers from your Class 9 Maths syllabus. This chapter explores the fundamentals of number systems and lays the foundation for your understanding of mathematical concepts. From natural numbers, whole numbers, and integers to rational and irrational numbers, this quiz will test your ability to recognize and apply the various types of numbers in different contexts. Let’s see how well you’ve grasped the basics and sharpen your mathematical skills. Get ready to challenge yourself and dive into the world of numbers!
Ques: State true/false:
The first five positive integers whose square roots are irrational numbers are 2, 3, 5, 6, 7.
a) True
b) False
Answer:
Correct option: A
The positive integers, whose square roots are irrational numbers, are 2, 3, 5, 6, 7. Thus, the given statement is true.
Ques: State true or false:
6+√2 is an irrational number.
a) True
b) False
Answer:
Correct option: A
Since √2 is irrational, 6+√2 is also irrational.
Ques: State true or false:
3-√5 is a rational number.
a) True
b) False
Answer:
Correct option: B
Since √5 is irrational, 3-√5 is also irrational.
Ques: State true or false:
1/√2 is an irrational number.
a) True
b) False
Answer:
Correct option: A
Since √2 is irrational, 1/√2 is also irrational.
Ques: State true or false:
7√5 is an irrational number.
a) True
b) False
Answer:
Correct option: A
Since √5 is irrational, 7√5 is also irrational.
Ques: State true or false:
2-√3 is an irrational number.
a) True
b) False
Answer:
Correct option: A
Since √3 is irrational, 2-√3 is also irrational.
Ques: State true or false: π is an irrational number.
a) True
b) False
Answer:
Correct option: A
π is an irrational number because its decimal expansion is non-terminating and non-repeating.
Ques: Find the smallest number by which √27 should be multiplied to get a rational number.
a) √3
b) 3√3
c) √27
d) 3
Answer:
Correct option: A
Multiplying √27 by √3 results in 9, which is a rational number.
Ques: The period and periodicity respectively in the decimal form of 8/11 is
a) 2 and 72
b) 72 and 2
c) 2 and 27
d) 3 and 727
Answer:
Correct option: B
8/11 = 0.727272…, where the period is 72 and the periodicity is 2.
