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 Sequences and Series No 4
Q1: If 2 3
2 3
1 1 1
.....
3 3 3
y x x x    then x is:
A)
2
1
y
y
B)
1
y
y
C)
3
1
y
y
D) NONE
Q2: If
1 1 1
8 16 32
16 16 16 .....y    then y is:
A) 4 B) 2 C) 3 D) 2
Q3: If A,G & H are the . , . .AM G M and H M between a
& b , then which one of the following is true:
A) A G H  B) A G H 
C) H A G  D) G A H 
Q4: The sum of the series 3 3 3 3
1 2 3 ......n   is:
A)
 
22
1
4
n n 
B)
 
22
1
2
n n 
C)
 
23
1
4
n n 
D) NONE
Q5: The general term of the sequence
2 4 6 8
, , ,.....x x x x 
is:
A)   2
1
n n
na x  B)  
1
1
n n
na x

 
C)   3
1
n n
na x  D)  
2n
na x 
Q6: If
1 1 1
, ,
a b c
are in a H.P, then b is:
A)
2ab
a b
B)
2ac
a c
C)
2
a c
D)
2
a b
ac

Q7: If
1 1 1
,
2 1 4 1
and
k k k 
are in H.P, then k is:
A) 1 B) 3 C) 2 D) 5
Q8: The 7th
term of H.P
1 1 1
, , ,.....
3 5 7
is:
A) 15 B)
1
14
C)
1
15
D)
1
10
Q9: If .G G M , .A AM and .H H M then:
A) 2 2 2
.G A H B) .G AH
C) 2
.G A H D) 2
.G A H
Q10: Which one is H.P?
A) 3,6,9,... B)
1 1 1
, , ,...
2 5 11
C)
1 1 1
, , ,...
3 6 9
D) NONE

2. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 2
Q11: If ,2 2,3 3,...y y y  is a G.P, then y is:
A) 1,4 B) 1,4 C) 1, 4  D) 1, 4
Q12: 1 2 3 .............. ?n    
A)  1n n  B)
 1
2
n n 
C)
 1
2
n n 
D)
 2
1
2
n n 
Q13:
2 2 2 2
1 2 3 .............. ?n    
A)
  1 2 1
3
n n n 
B)
  1 2 1
2
n n n 
C)
  1 2
3
n n n 
D)
  1 2 1
6
n n n 
Q14:
3 3 3 3
1 2 3 .............. ?n    
A)
 
2
1
2
n n  
 
 
B)
 
2
1
2
n n  
 
 
C)
 
3
1
2
n n  
 
 
D)
 
2
1
3
n n  
 
 
Q15:
0
1 ?
n
n
k
S

 
A) 1 B) n C) 1n  D) 2
n
Q16:
0
?
n
n
k
S k

 
A)  1n n  B)
 1
2
n n 
C)
 1
2
n n 
D)
 2
1
2
n n 
Q17: 2
0
?
n
n
k
S k

 
A)
  1 2 1
3
n n n 
B)
  1 2 1
6
n n n 
C)
  1 2
3
n n n 
D)
  1 2
6
n n n 
Q18: 3
0
?
n
n
k
S k

 
A)
 
2
1
2
n n  
 
 
B)
 
2
1
2
n n  
 
 
C)
 
3
1
2
n n  
 
 
D)
 
2
1
3
n n  
 
 
Q19: The difference of two consecutive terms of an A.P is
called its:
A) A.M B) G.M
D) Common Difference D) Common Ratio
Q20: 5,15,20,25 ... is:
A) A.M B) G.M D) H.M D) NONE
Answer Key
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20