Number Series Questions for IPPB Exam

Set I

Directions (1-5): In each of the following number series one number is wrong, Find out the wrong number.

Ques 1)

749, 890, 1089, 1345, 1669, 2069
1. 1669
2. 749
3. 890
4. 2069
5. 1089

3; The series is 

Hence, there is should be 893 in place of 890.

Ques 2)

39, 235, 1647, 13289, 118615
1. 235
2. 39
3. 118615
4. 1647
5. 13289

5; The series is 

Hence, there should be 13179 in place of 13289

Ques 3)

53, 217, 1943, 31103, 77555
1. 77555
2. 217
3. 1943
4. 53
5. 31103

1; The series is 

Hence, there should be 7775555 in place of 77555.

Ques 4)

2394, 798, 3192, 688.4, 3830.4, 547.2
1. 3830.4
2. 547.2
3. 688.4
4. 798
5. 3192

3; The series is 

Hence, there should be 638.4 in place of 688.4

Ques 5)

28, 31, 68, 216, 896
1. 896
2. 28
3. 31
4. 216
5. 68

1; The series is 

Hence, there should be 888 in place of 896.

Set - II

Directions (1-5): What is the value should come in place of question mark (?) in the following number series?

Ques 1)

48, ?, 94, 123, 156, 193
1. 74
2. 64
3. 65
4. 69
5. 76

4; The series is:
2² + (11 x 4) = 48
3² + (12 x 5) = 69
4² + (13 x 6) = 94
5² + (4 x 7) = 123
6² + (5 x 8) = 156
7² + (16 x 9) = 193

Ques 2)

37, ?, 65, 82, 101, 122
1. 50
2. 55
3. 45
4. 42
5. 48

1; The series is :
8 x 3 + 13 = 37
9 x 4 + 14 = 50
10 x 5 + 15 = 65
11 x 6 + 16 = 82
12 x 7 + 17 x 101
13 x 8 + 18 = 122

Ques 3)

8, 48, 32, 192, ?, 1056
1. 181
2. 176
3. 167
4. 185
5. 171

2; The series is 

Ques 4)

14, 28, 46, ?, 94, 124
1. 64
2. 76
3. 82
4. 72
5. 68

5; The series is :
4 x 2 + 6 = 14
5 x 4 + 8 = 28
6 x 6 + 10 = 46
7 x 8 + 12 = 68
8 x 10 + 14 = 94
9 x 12 + 16 = 124

Ques 5)

19, 23, 17.5, 60.5, ?, 137.625
1. 21.125
2. 24.125
3. 20.125
4. 30.125
5. 25.125

5; The series is