Series Set – 5

1. 6.5, 11, 35, ?, 685 , 4104, 28735
A) 146
B) 136
C) 138
D) 142
E) 144

Answer & Explanation

 Option B
Pattern:

×2 – 2, ×3 + 3, ×4 – 4, ×5 + 5, ×6 – 6,

 

2. 132, 152, 176, ?, 244, 292, 352
A) 200
B) 208
C) 206
D) 222
E) 198

Answer & Explanation

 Option C 
Pattern:
Double difference series:
+20,      +24,        +30,        + 38,           + 48           + 60
.       +4         +6             +8              +10           +12

 

3. 240, ?, 120, 40, 10, 2
A) 80
B) 120
C) 240
D) 200
E) 160

Answer & Explanation

 Option C 
Pattern:
÷1, ÷2, ÷3, ÷4, ÷5,

 

4. 12, 19, 38, ?, 136, 227, 354
A) 85
B) 88
C) 105
D) 75
E) 82

Answer & Explanation

 Option D 
Pattern:
+7       +19          +37        +61            +91             +127
.   +12          +18         +24         +30            +36

 

 

5. 103, ?, 129, 166, 227, 318
A) 107
B) 110
C) 119
D) 118
E) 120

Answer & Explanation

 Option B 
Pattern:
+7      +19        +37             +61            +91
.    +12      +18          +24             +30

 

 

6. 20, 5, ?, 2.5, 5, 20
A) 3.50
B) 10
C) 2.5
D) 1.50
E) 4

Answer & Explanation

 Option C 
Pattern:
×0.25, ×0.50, ×1, ×2, ×4,

 

 

7. 11,24,51,89,141,206
A) 141
B) 24
C) 51
D) 89
E) None of these

Answer & Explanation

 Option C 
Pattern:
+13, +26, +39, +52, +65

 

8. 14, 70, 98, 112, 119, 121.5
A) 98
B) 121.5
C) 119
D) 70
E) None of these

Answer & Explanation

 Option B 
Pattern:
+56, +28, +14, +7, +3.5

 

9. 17, 187, 332, 458, 555, 637
A) 555
B) 458
C) 17
D) 637
E) None of these

Answer & Explanation

 Option B 
Pattern:
+ (132 +1), + (122 +1), + (112 +1), + (102 +1)

 

10. 14, 33, 104, 420, 2110
A) 420
B) 433
C) 411
D) 1172
E) None of these

Answer & Explanation

 Option A 
Pattern:
×2 + 5, ×3 + 5, ×4 + 5, ×5 + 5

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