Practice Paper – Case Study Questions
Subject: Mathematics Ch 1: Number System
Std: IX Answer Scheme
Attempt all questions
Q. No. Case Study 1
Real numbers are numbers which include both
1. rational and irrational numbers. Rational
numbers are the numbers which can be
p
expressed in the form of where p and q are
q
integers and q not equal to zero. Irrational
numbers are numbers which cannot be
expressed as a ratio of two integers.
i. Every rational number is
a. Whole number
b. Natural number
c. Integer
d. Real number
ii. The product of two irrational numbers is
a. Always rational
b. Always irrational
c. Always integer
d. Sometimes rational sometimes irrational
iii. Between two rational numbers,
a. there is no rational number
b. there is exactly one rational number
c. there are infinitely many irrational numbers
d. there is no irrational number
iv. The sum of a rational and an irrational numbers is
a. Rational
b. Irrational
c. Both rational and irrational
d. None of the above
v. Which of the following is an irrational number?
CB/IX/2223 Ch 1:Number System page 1 of 3
Subject: Mathematics Ch 1: Number System
Std: IX Answer Scheme
Attempt all questions
Q. No. Case Study 1
Real numbers are numbers which include both
1. rational and irrational numbers. Rational
numbers are the numbers which can be
p
expressed in the form of where p and q are
q
integers and q not equal to zero. Irrational
numbers are numbers which cannot be
expressed as a ratio of two integers.
i. Every rational number is
a. Whole number
b. Natural number
c. Integer
d. Real number
ii. The product of two irrational numbers is
a. Always rational
b. Always irrational
c. Always integer
d. Sometimes rational sometimes irrational
iii. Between two rational numbers,
a. there is no rational number
b. there is exactly one rational number
c. there are infinitely many irrational numbers
d. there is no irrational number
iv. The sum of a rational and an irrational numbers is
a. Rational
b. Irrational
c. Both rational and irrational
d. None of the above
v. Which of the following is an irrational number?
CB/IX/2223 Ch 1:Number System page 1 of 3
