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Series Set – 22

1. 12, 36, 48, 132, 218, 492, 912
A) 35
B) 48
C) 132
D) 218
E) 492

Answer & Explanation

 Option D
Pattern:
12×2 + 12 = 36
36×2 – 24 = 48
48×2 + 36 = 132
132×2 – 48 = 216
216×2 + 60 = 492
492×2 – 72 = 912

 

2. 1148, 586, 304, 162, 90, 62, 33.5
A) 586
B) 304
C) 162
D) 90
E) 62

Answer & Explanation

 Option E
Pattern: 
1148÷2 + 12 = 586
586÷2 + 11 = 304
304÷2 + 10 = 162
162÷2 + 9 = 90
90÷2 + 8 = 53
53÷2 + 7 = 912

 

3. 26, 50, 148, 516, 2164, 10920, 65664
A) 50
B) 148
C) 516
D) 2164
E) 10920

Answer & Explanation

 Option D
Pattern:
26×1 + 24×1 = 50
50×2 + 24×2 = 148
148×3 + 24×3 = 516
516×4 + 24×4  = 2160
2160×5 + 24×5  = 10920
10920×6 + 24×6  = 65664

 

4. 444, 220, 112, 52, 24, 10, 3
A) 220
B) 112
C) 52
D) 24
E) 10

Answer & Explanation

 Option B
Pattern:
(444-4) ÷ 2 = 220
(220-4) ÷ 2 = 108
(108-4) ÷ 2 = 52
(52-4) ÷ 2 = 24
(24-4) ÷ 2 = 10
(10-4) ÷ 2 = 3  

 

5. 42, 60, 96, 156, 222, 312, 420
A) 33
B) 96
C) 156
D) 222
E) 312

Answer & Explanation

 Option C
Pattern:
+18, + 18*2, + 18*3, + 18*4, + 18*5, + 18*6

 

6. 14, 9, 12, 28, 121, 942, 15079
A) 9
B) 12
C) 28
D) 121
E) 942

Answer & Explanation

 Option D
Pattern:
14×0.5 + 2 = 9
9×1 + 3 = 12
12×2 + 4 = 928
28×4 + 5 = 117
117×8 + 6 = 942
942×16 + 7 = 15079

 

7. 12, 24, 41, 68, 105, 172, 259
A) 23
B) 41
C) 68
D) 105
E) 172

Answer & Explanation

 Option D
Pattern:
12…….24……..41…….68…….110……172……259
….+12……+17…..+27……+42…….+62…..+87
……….+5……+10……+15……+20……+25

 

8. 9, 16, 27, 50, 77, 124, 191
A) 16
B) 27
C) 50
D) 77
E) 124

Answer & Explanation

 Option C
Pattern:
9…….16……..27…….46…….77……124……191
…+7……+11…….+19….+31……+47…..+67
……+4……..+8……+12……+16….+20

 

9. 9, 21, 45, 94, 189, 381, 765
A) 21
B) 45
C) 94
D) 189
E) 381

Answer & Explanation

 Option C
Pattern:
9×2 + 3 = 21
21×2 + 3 = 45
45×2 + 3 = 93
93×2 + 3 = 189
189×2 + 3 = 381
381×2 + 3 = 765  

 

10. 8, 10, 36, 73, 297, 1491, 8953
A) 10
B) 36
C) 73
D) 297
E) 1491

Answer & Explanation

 Option B
Pattern:
8×1 + 2 = 10,
10×2 + 3 = 23,
23×3 + 4 = 73,
73×4 + 5 = 297,
297×5 + 6 = 1491,
1491×6 + 7 = 8953   

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