This document contains a 20 question quiz on concepts in number systems and properties of real numbers. The questions cover topics like rational vs irrational numbers, properties of sets, operations on fractions, expressions of rational numbers, identities, inverses, closure properties, and distributive, commutative, and associative properties.

1. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 1
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CLASS
XI
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Composed by Engin Baştürk FEDERAL BOARD
TYPE Objective Number System No 4
Q1: 7 is ........
A) an irrational number B) a prime number
C) a rational number D) a whole number
Q2: Golden rule of fraction is that for 0, ...........
a
k
b
 
A)
ab
k
B)
k
ab
C)
kb
ka
D)
ka
kb
Q3: Whicf of the following sets has closure property with
respect to addition?
A)  1,1 B)  1
C)  1 D)  0
Q4: Whicf of the following sets has closure property with
respect to multiplication?
A)  1,1 B)  1
C)  1,0 D)  0,2
Q5: For , , , , 0, 0a b c d R b d   then
a c
b d

A)
ac bd
bd

B)
ab cd
bd

C)
ad bc
bd

D) abcd
Q6: Rational Numbers expressed in the form of ……..
A)
a
b
B)
a
b
C)
2
2
a
b
D) ab
Q7: For any two real No’s , 0x y x y   the x and y
are …………. of each other.
A) Identity B) Inverse
C) Reciprocal D) None of these
Q8: For any two real numbers , . 1x y x y  , this property
is called as …………..
A) Multiplicative Identity B) Multiplicative inverse
C) additive inverse D) none of these
Q9: The property used in  11 11 0   is said to be:
A) Additive Inverse B) Additive identity
C) Inverse D) None of These
Q10: For , ,a b c a c b c a b       , this
property is called _________ property w.r.t to addition.
A) Additive B) Multiplicative
C) Cancelation D) None of these

2. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 2
Q11: Which of the following sets has closure property w.r.t
multiplication ________?
A)  0 B)  0,1
C)  1,1 D)  0, 1
Q12: The value of 2 is …………
A) Rational Number B) Irrational number
C) Natural number D) None of these
Q13: Which of the following sets has closure property w.r.t
multiplication ________?
A)  2, 1,0 B)  2,0,1
C)  0, 1,1 D)  0, 1
Q14: The additive identity of real numbers is always ….
A) Two B) Three
C) One D) Zero
Q15: The property used in
 , ,x y z x y z x z y z         is ……… property.
A) Distributive B) Commutative
C) Associative D) None
Q16: The sum of Real and Imaginary numbers is known as
….
A) Real Number B) Complex Number
C) Rational Number D) Irrational Number
Q17: Which of the following is associative property of real
numbers?
A) A B B A  
B)    A B C A B C    
C) A B B A  
D)  A B C A B A C     
Q18: Which of the following is commutative property of real
numbers?
A) A B B A  
B)    3 4 5 3 4 5    
C)  2 2 0  
D) 4 1 4 
Q19: Which of the following is additive property of real
numbers?
A) 4 4a b a b     B) 4 4a b a b    
C)   0a a   D)
1
1a
a
 
Q20: The sum of multiplicative identity and its multiplicative
inverse is:
A) 1 B) 0
C) 1 D) 2
Answer Key
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