Number Series
What will come in place of the question mark (?) in each of the following number series?
1. 17, 19, 33, ?, 129, 227
1) 64 2) 73 3) 67
4) 72 5) None of these
A: 3;
17 + 22 – 2 = 19
19 + 42 – 2 = 33
33 + 62 – 2 = 67
67 + 82 – 2 = 129
129 + 102 – 2 = 227
2. 35, 256, 451, 620, 763, ?
1) 680 2) 893
3) 633 4) 880
5) None of these
A: 4;
35 + 221 = 256
256 + [(221 – 26) = 195] = 451
451 + [(195 – 26) = 169] = 620
620 + [(169 – 26) = 143] = 763
763 + [(143 – 26) = 117] = 880
3. 18, 139, 868, 917, ?, 1051
1) 1042 2) 1036
3) 942 4) 996
5) None of these
A: 1;
18 + 112 = 139
139 + 93 = 868
868 + 72 = 917
917 + 53 = 1042
1042 + 32 = 1051
4. 2890, ?, 1162, 874, 730, 658
1) 1684 2) 1738
3) 1784 4) 1672
5) None of these
A: 2;
2890 – 1152 = 1738
1738 – 576 = 1162
1162 – 288 = 874
874 – 144 = 730
730 – 72 = 658
5. 14, 1004, 1202, 1251.5, 1268, ?
1) 1267.5 2) 1276.25
3) 1324.5 4) 1367.25
5) None of these
A: 2; 14 + 990 = 1004
1004 + 990 ÷ 5 = 1202
1202 +198 ÷ 4 = 1251.5
1251.5 + 49.5 ÷ 3 = 1268
1268 + 16.5 ÷ 2 =1276.25
6. 987, 587, 331, 187, 123, ?
1) 104 2) 113
3) 107 4) 114
5) None of these
A: 3; 987 – 202 = 587
587 – 162 = 331
331 – 122 = 187
187 – 82 = 123
123 – 42 = 107
7. 125, 171, 263, 401, 585, ?
1) 835 2) 815
3) 792 4) 788
5) None of these
A: 2; 125 + 46 = 171
171 + 92 = 263
263 + 138 = 401
401 + 184 = 585
585 + 230 = 815
8. 121, 132, 167, 226, 309, ?
1) 424 2) 413
3) 427 4) 416
5) None of these
A: 4; 121 + (11 × 1 + 0) = 132
132 + ( 11 × 3 +2) = 167
167 + (11 × 5 + 4) = 226
226 + ( 11 × 7 + 6) = 309
309 + ( 11 × 9 + 8) = 416
9. 2, 12, 36, 80, 150, 252, ?
1) 344 2) 350
3) 492 4) 501
5) None of these
A: 3; 12 + 13 = 2
22 + 23 = 12
32 + 33 = 36
42 + 43 = 80
52 + 53= 150
62 + 63 = 252
72 +73 = 492
10. 20, 42, 129, 520, ?
1) 2200 2) 2605
3) 27012 4) 4500
5) None of these
A: 2; 20 × 2 + 2 = 42
42 × 3 + 3 = 129
129 × 4 + 4 = 520
520 × 5 + 5 = 2605
11. 8, 11, 20, 47, 128, ?
1) 483 2) 488
3) 397 4) 371
5) None of these
A: 4; 8 + 31 = 11
11 + 32 = 20
20 + 33 = 47
47 + 34 = 128
128 + 35 = 371
12. 71, 78, 99, 134, 183, ?
1) 253 2) 239
3) 246 4) 253
5) None of these
A: 3; 71 + 7 × 1 = 78
78 + 7 × 3 = 99
99 + 7 × 5 = 134
134 + 7 × 7 = 183
183 + 7 × 9 = 246
13. 342, 337.5, 328.5, 315, 297, ?
1) 265.5 2) 274.5
3) 270 4) 260
5) None of these
A: 2; 342 – 4.5×1 = 337.5
337.5 – 4.5×2 = 328.5
328.5 – 4.5×3 = 315
315 – 4.5×4 = 297
297 – 4.5×5 = 274.5
14. 239, 254, 284, 344, 464, ?
1) 726 2) 716
3) 724 4) 714
5) None of these
A: 5; 239 + 15 = 254
254 + 30 = 284
284 + 60 = 344
344 + 120 = 464
464 + 240 = 704
15. 8, 10, 18, 44, 124, ?
1) 344 2) 366
3) 354 4) 356
5) None of these
A: 2; The pattern of the number series is as given below
8 + 2 = 10
10 + 8 = 18 ; (3 × 2 + 2 = 8)
18 + 26 = 44 ; (3 × 8 + 2 = 26)
44 + 80 = 124 ; (3 × 26 + 2 = 80)
124 + 242 = 366 ; (3 × 80 + 2 = 242)
16. 13, 25, 61, 121, 205, ?
1) 323 2) 326
3) 324 4) 313
5) None of these
A: 4; The pattern of the number series is as given below
13 + 12 × 1 = 25
25 + 12 × 3 = 61
61 + 12 × 5 = 121
121 + 12 × 7 = 205
205 + 12 × 9 = 313
17. 656, 352, 200, 124, 86, ?
1) 67 2) 59 3) 62 4) 57
5) None of these
A: 1; The pattern of the number series is as given below
18. 454, 472, 445, 463, 436, ?
1) 436 2) 456
3) 454 4) 434
5) None of these
A: 3; The pattern of the number series is as given below
454 + 18 = 472
472 – 27 = 445
445 + 18 = 463
463 – 27 = 436
436 + 18 = 454
19. 12, 18, 36, 102, 360, ?
1) 1364 2) 1386
3) 1384 4) 1376
5) None of these
A: 2; The pattern of the number series is as given below
12 × 4 – 30 = 18
18 × 4 – 36 = 36
36 × 4 – 42 = 102
102 × 4 – 48 = 360
360 × 4 – 54 = 1386
20. 32, 49, 83, 151, 287, 559, ?
1) 1118 2) 979
3) 1103 4) 1120
5) None of these
A: 3; 32 + 17 = 49
49 + 34 = 83
83 + 68 = 151
151 + 136 = 287
287 + 272 = 559
559 + 544 = 1103
21. 462, 552, 650, 756, 870, 992, ?
1) 1040 2) 1122
3) 1132 4) 1050
5) None of these
A: 2; 462 + 90 = 552
552 + 98 = 650
650 + 106 = 756
756 + 114 = 870
870 + 122 = 992
992 + 130 = 1122
22. 15, 18, 16, 19, 17, 20, ?
1) 23 2) 22 3) 16 4) 18
5) None of these
A: 4; Alternative Series
23. 1050, 420, 168, 67.2, 26.88, 10.752, ?
1) 4.3008 2) 6.5038
3) 4.4015 4) 5.6002
5) None of these
A: 1; 1050 ÷ 2.5 = 420
420 ÷ 2.5 = 168
168 ÷ 2.5 = 67.2
67.2 ÷ 2.5 = 26.88
26.88 ÷ 2.5 =10.752
10.752 ÷ 2.5 = 4.3008
24. 0, 6, 24, 60, 120, 210, ?
1) 343 2) 280
3) 335 4) 295
5) None of these
A: 5; 0 + 6 × 1 = 6
6 + 6 × 3 = 24
24 + 6 × 6 = 60
60 + 6 × 10 = 120
120 + 6 × 15 = 210
210 + 6 × 21 = 336
25. 958, 833, 733, 658, 608, ?
1) 577 2) 583
3) 567 4) 573
5) None of these
A: 2; The patterns of the number series is as given below
958 – 125 = 833
833 – 100 = 733
733 – 75 = 658
658 – 50 = 608
608 – 25 = 583
26. 11, 10, 18, 51, 200, ?
1) 885 2) 1025
3) 865 4) 995
5) None of these
A: 4; The patterns of the number series is as given below
11 × 1 – 1 = 10
10 × 2 – 2 = 18
18 × 3 – 3 = 51
51 × 4 – 4 = 200
200 × 5 – 5 = 995
27. 25, 48, 94, 186, 370, ?
1) 738 2) 744
3) 746 4) 724
5) None of these
A: 1; The patterns of the number series is as given below
25 × 2 – 2 = 48
48 × 2 – 2 = 94
94 × 2 – 2 = 186
186 × 2 – 2 = 370
370 × 2 – 2 = 738
28. 14, 24, 43, 71, 108, ?
1) 194 2) 154
3) 145 4) 155
5) None of these
A: 2; The patterns of the number series is as given below
14 + 10 = 24
24 + 10 + 9 = 43
43 + 19 + 9 = 71
71 + 28 + 9 = 108
108 + 37 + 9 = 154
29. 144, 173, 140, 169, 136, ?
1) 157 2) 148
3) 164 4) 132
5) None of these
A: 5; The patterns of the number series is as given below
144 + 29 = 173
173 – 33 = 140
140 + 29 = 169
169 – 33 = 136
136 + 29 = 165
30. 33, 39, 57, 87, 129, ?
1) 183 2) 177
3) 189 4) 199
5) None of these
A: 1; The patterns of the number series is as given below
33 + 6 = 39
39 + 18 ( = 6 + 12 ) = 57
57 + 30 ( = 18 + 12 ) = 87
87 + 42 ( = 30 + 12) = 129
129 + 54 ( = 42 + 12) = 183
31. 15, 19, 83, 119, 631, ?
1) 731 2) 693
3) 712 4) 683
5) None of these
A: 1; The patterns of the number series is as given below
15 + 22 = 19
19 + 43 = 83
83 + 62 = 119
119 + 83 = 631
631 + 102 = 731
32. 19, 26, 40, 68, 124, ?
1) 246 2) 238
3) 236 4) 256
5) None of these
A: 3; The patterns of the number series is as given below
19 + 1 × 7 = 26
26 + 2 × 7 = 40
40 + 4 × 7 = 68
68 + 8 × 7 = 124
124 + 16 × 7 = 236
33. 43, 69, 58, 84, 73, ?
1) 62 2) 98
3) 109 4) 63
5) None of these
A: 5; The patterns of the number series is as given below
43 + 26 = 69
69 – 11 = 58
58 + 26 = 84
84 – 11 = 73
73 + 26 = 99
అంకగణితము బ్యాంక్ పిఓఎస్ & క్లర్క్ పరీక్షలు స్పెషల్
Published Fri, Oct 4 2013 11:27 PM | Last Updated on Fri, Sep 1 2017 11:20 PM
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