Directions(1-10): Find the missing number in the given series:
1. 13, 7, 6, 14, 52, _
A. 482
B. 476
C. 466
D. 424
E. 460
Sol. D.424
13 * 0.5 + 0.5 = 7
7 * 1 – 1 = 6
6 * 2 + 2 = 14
2. 139, 142, 133, 160, 79, _
A. 326
B. 322
C. 331
D. 340
E. 355
Sol. B.322
139 + 3 = 142
142 – 9 = 133
133 + 27 = 160
3. 10, 16, 27, 48, 84, _
A. 138
B. 153
C. 166
D. 140
E. 135
Sol. D
16 – 10 = 6
27 – 16 = 11
48 – 27 = 21; 11 – 6 = 5, 21 – 11 = 10
4. 66, 77, 63, 73, 60, _
A. 66
B. 69
C. 61
D. 64
E. 63
Sol. B
66 – 63 = 3
77 – 73 = 4
63 – 60 = 3
5. 16, 9, 8, 13, 25, _
A. 64.5
B. 59.5
C. 63.5
D. 68.5
E. 61.5
Sol. C
16 * 0.5 + 1 = 9
9 * 1 – 1 = 8
8 * 1.5 + 1 = 13
6. 11, 12, 22, 69, 272, _
A. 1365
B. 1368
C. 1324
D. 1325
E. 1329
Sol. A
11 * 1 + 1 = 12
12 * 2 – 2 = 22
22 * 3 + 3 = 69
7. 11, 13, 16, 33, 96, _
A. 358
B. 354
C. 386
D. 366
E. 353
Sol. E
11 + 1² + 1= 13
13 + 2² – 1= 16
16 + 4² + 1= 33
8. 4, 21, 120, 595, 2376, _
A. 7125
B. 7035
C. 7085
D. 7055
E. 7115
Sol. A
4*7 -7 = 21
21*6 -6 = 120
120*5 -5 = 595
9. 64, 66, 75, 103, 168, _
A. 282
B. 294
C. 286
D. 295
E. 288
Sol. B
64 + (1³ + 1) = 66
66 + (2³ + 1) = 75
75 + (3³ + 1) = 103
10. 13, 25, 39, 57, 83, _
A. 122
B. 124
C. 126
D. 120
E. 125
Sol. E
13*2 – 1 = 25
25*2 – 11 = 39
39*2 – 21 = 57
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