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# Missing Number Problems

Some numbers are arranged in a particular rule or order or logic then those Numbers are in Series.Based on various type of Question asked in different competitive Exams.We divided the Series into Three types.

• 1. Numbers series
• 2. Letter Series
• 3. Repeated Series

TYPES OF SERIES

• Natural Numbers: 1,2,3,4………
• Evennumbers: 2,4,6,8,10………
• Odd numbers: 1,3,5,7,9,11………
• Prime numbers: 2,3,5,7,11,13,……

Increasing Series

• a) Addition Series
• b) Product Series

Decreasing Series

• a) Sub traction Series
• b) Division Series
• Square Series(n2)
• Cube Series(n3)

COMBINATION SERIES
n2+1,n2-1,n3+1,n3-1,n2+n,n2-n,n3+n,n3-n,×n+1,×n-1,×n+n,×n-n,n3+n2,n3-n2….etc
In present exams, two models of number series are given.

Missing term: In this series one term will be missing. Based on the logic of the other we have to find out the missing term.

Wrong number: In this series.one term will be given wrong. We have to find out that wrong number.

SOME PRACTICE QUESTIONS

Directions(1-20):
In these questions, a number series is given. Find out the missing number.
1) 18, 10, 8, 9, 11.5, ?
A. 14.75
B. 10.75
C. 18.75
D. 19.75
E. 20.75

2) 6 4 6 12 22 ?
A. 26
B. 36
C. 86
D. 66
E. 46

3) 20, 39, 74, ?, 262, 499
A. 146
B. 169
C. 166
D. 139
E. 129

4) 15, 32, 60, 122, 240, ?
A. 362
B. 488
C. 482
D. 364
E. 382

5) 14, 12, 28, 78, 320, ?
A. 1450
B. 1590
C. 1440
D. 1810
E. 1690

6) 31, 16, 10, 14, 38.5, ?
A. 167.25
B. 177.25
C. 147.25
D. 174.25
E. 185.25

7) 25, 25, 37, 57, 113, ?
A. 202
B. 207
C. 185
D. 195
E. 190

8) 18, 20, 40, 70, 142, ?
A. 232
B. 254
C. 188
D. 196
E. 240

9) 720, 520, 336, 222, 120, ?
A. 78
B. 68
C. 76
D. 56
E. 58

10) 72, 72, 42, 42, 20, ?
A. 30
B. 40
C. 50
D. 20
E. 10

11) 14, 8, 6, 6, 7, ?
A. 6.5
B. 7.5
C. 8.5
D. 9.5
E. None of these

12) 6, 13, 20, 65, 256, ?
A. 1283
B. 1756
C. 2786
D. 2686
E. None of these

13) 24, 28, 40, ?, 88, 124
A. 40
B. 60
C. 66
D. 35
E. None of these

14) 15, 8, 7, 16, 60, ?
A. 362
B. 488
C. 388
D. 364
E. None of these

15) 19, 23, 40, 70, 113, ?
A. 145
B. 169
C. 144
D. 381
E. None of these

16) 12, 6.5, 7.5, 12.75, 27.5, ?
A. 70.25
B. 73.25
C. 71.25
D. 74.25
E. None of these

17) 965, 622, 406, 281, 217, ?
A. 170
B. 180
C. 190
D. 160
E. None of these

18) 18, 22, 35, 121, 459, ?
A. 2331
B. 2531
C. 1509
D. 1459
E. None of these

19) 10, 66, 325, 1304, 3909, ?
A. 7850
B. 7820
C. 7460
D. 7560
E. None of these

20) 20, 119, 592, 2363, ?
A. 7086
B. 7082
C. 7087
D. 7085
E. None of these

21) 14 6 4 4 8 ?
A. 26
B. 32
C. 46
D. 27
E. None of these

22) 6 16 45 184 917 ?
A. 5506
B. 4756
C. 5786
D. 5686
E. None of these

23) 24 28 19 35 10 ?
A. 46
B. 56
C. 66
D. 65
E. None of these

24) 15 22 36 64 ? 232
A. 120
B. 140
C. 180
D. 150
E. None of these

25) 19 23 14 30 5 ?
A. 45
B. 41
C. 51
D. 35
E. None of these

26) 12, 8, 16, 48, 184, ?
A. 560
B. 420
C. 860
D. 550
E. None of these

27) 12 19 33 61 ? 229
A. 117
B. 113
C. 107
D. 163
E. None of these

28) 18, 8, 6, 8, 22 ?
A. 125
B. 100
C. 150
D. 145
E. None of these

29) 5 12 33 136 675 ?
A. 3850
B. 3950
C. 3460
D. 4056
E. None of these

30) 20, 10, 12, 24, 75, ?
A. 320.5
B. 325.5
C. 330.5
D. 335.5
E. None of these

31) 12, 19, 35, 59, 90, ?
A. 126
B. 132
C. 146
D. 127
E. None of these

32) 4, 10, 27, 112, 555, ?
A. 3336
B. 4756
C. 3786
D. 3686
E. None of these

33) 6, 14, 45, 184, 925, ?
A. 4596
B. 5556
C. 6756
D. 6556
E. None of these

34) 11, 20, 38, 74, ?
A. 146
B. 164
C. 182
D. 150
E. None of these

35) 15,21,38,65,101 ?
A. 145
B. 150
C. 155
D. 130
E. None of these

36) 13, 21, 37, 69, ?, 261
A. 156
B. 133
C. 163
D. 173
E. None of these

37) 18 23 36 56 82 ?
A. 117
B. 113
C. 107
D. 163
E. None of these

38) 25, 29, 20, 36, 11 ?
A. 47
B. 57
C. 67
D. 37
E. None of these

39) 6 14 39 160 795 ?
A. 4776
B. 4263
C. 4463
D. 4564
E. None of these

40) 22 10 8 12 40 ?
A. 304
B. 634
C. 264
D. 164
E. None of these

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