#missing #series 1. 11, 15, 31, 67, 131, ? A. 233 B. 221 | Data Interpertation & airthmatic

#missing #series

1. 11, 15, 31, 67, 131, ?
A. 233
B. 221
C. 243
D. 231
E. None of these

2. 483, 471, 435, 375, 291, ?
A. 183
B. 184
C. 185
D. 186
E. None of these

3. 5, 7, 13, 25, 45, ?
A. 67
B. 75
C. 65
D. 55
E. None of these

4. 4, 11, 25, 53, 109, ?
A. 221
B. 234
C. 212
D. 222
E. None of these

5. 15, 21, 33, 51, 75, ?
A. 113
B. 103
C. 105
D. 115
E. None of these

6. 325, 314, 292, 259, 215, ?
A. 126
B. 116
C. 130
D. 160
E. None of these

7. 45, 46, 70, 141, ?, 1061.5
A. 353
B. 353.5
C. 352.5
D. 352
E. None of these