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 2
Q1: Every real number is also a .............
A) Natural Number B) Complex Number
C) Rational Number D) Whole Number
Q2: If z a bi  then z is:
A) a ib B) a ib 
C) a ib  D) 2 2
a b
Q3: If z a ib  , then z a ib  is called …...... of z
A) Root B) Inverse
C) Conjugate D) Identity
Q4: The complex number "a "i is called purely:
A) Real B) Complex
C) imaginary D) None
Q5: z is same with ……………
A) z B) z
C) z D) z
Q6: If a+ bz i , then z  ________
A) 2 2
a b B) 2 2
a b
C) a b D) None of these
Q7: If z a bi  then z
A) 2 2
a b B) 2 2
a b
C) 2 2
a b D) 2 2
a b
Q8: Find the modulus of 3 4i
A) 5 B) 5
C) 5 D) 5
Q9: If 7 2z i  then z
A) 53 B) 53
C) 53 D) 45
Q10: If 1 5 4z i   and 2 5 2z i  then 1 2 ...........z z 
A) 4i B) 10
C) 10 D) 2i

2. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 2
Q11: Which of the following is equal to
2
z
A) 2
z B) .z z
C)
2
z D) z
Q12: 81 16   is equal to ………
A) 5i B) 5i
C) 13i D) 12i
Q13: 64 100   is equal to ………
A) 2i B) 2i
C) 18i D) 18i
Q14: 12 144  is equal to ………
A) 12 2 3i B) 12 2 3i
C) 12 2 3i  D) 12 4 3i
Q15: The polar form of a complex number is ….
A)  tan cotr i  B)  sin cosr i 
C)  sec cscr i  D)  sec cscr i 
Q16:
1 3
........
2 2
i

 
A) 3 B) 1
C) 2 D) 0
Q17:
2
............
1 i


A) 1 i B) 1 i
C)  2 1 i D)  2 1 i
Q18:
7
5

is ……..
A)
7
5
i
i
B)
7
5
C)
7
5
i D) None of these
Q19: The additive identity in Complex numbers is:
A)  0,0 B)  1,1
C)  1,0 D)  0,1
Q20: In terms of i , 3 ______.
A) 3i B) 3i
C) 3i D) 3i
Answer Key
1 2 3 4 5 6 7 8 9 10
B A C C C B B A A D
11 12 13 14 15 16 17 18 19 20
B A B A B B A C C B