SERIES QUESTIONS FOR IBPS SET 1

SERIES QUESTIONS FOR IBPSBelow is the practice set on series questions for IBPS PO, Clerk exam. The explanations are given at the end of the questions. A number series is given and you have to find only one number which is given wrong in the series.

In each of these questions, a number series is given. In each series only one number is wrong. find out the wrong number.

Set 1 Series questions for IBPS

1. 5531     5506     5425     5304     5135     4910     4621
A.5531
B.5425
C.4621
D.5135
E.5506

2. 6     7     9     13     26     37     69
A.7
B.26
C.69
D.37
E.9

3. 1     3     10     36     152     760     4632
A.3
B.36
C.4632
D.760
E.152

4. 4     5     13     40     105     229      445
A.4
B.13
C.105
D.445
E.229

5. 157.5     45     15     6     3     2     1
A.1
B.2
C.6
D.157.5
E.45

6. 7     12     40     222     1742     17390     208608
A.222
B.12
C.40
D.1742
E.208608

7. 6     91     584     2935      11756     35277     70558
A.6
B.70558
C.584
D.2935
E.35277

8. 9050     5675     3478     2147     1418     1077     950
A.950
B.1418
C.5675
D.2147
E.1077

9. 1     4     25     256     3125     46656     823543
A.4
B.823543
C.46656
D.25
E.256

10. 8424     4212     2106     1051     526.5     263.25     131.625
A.526.5
B.1051
C.4212
D.8424
E.263.25

ANSWERS with explanation

1.The pattern is-
5531 – 5506 = 25 = 5 2
5555 – 5506 = 49 = 7
5506 – 5425 = 82 = 9
5425 – 5304 = 121 = 11
5304 – 5135 = 169 = 13
5135 – 4910 = 225 = 15
4910 – 4621 = 289 = 17

2.The pattern is-
6 + 1 = 7
7 + 1 x 2 = 9
9 + 2 x 2 = 13
13 + 8 = 21 ≠ 26
21 + 16 = 37
37 + 32 = 69

3.The pattern is-
1 x 1 + 2 = 3
3 x 2 + 4 = 10
10 x 3 + 6 = 36
36 x 4 + 8 = 152
152 x 5 + 10 = 770 ≠ 760
770 x 6 + 12 = 4632

4.The pattern is-
4 + 1 3 = 5
5 + 2 3 = 13
13 + 33 = 40
40 + 43 = 104 ≠ 105
104 + 53 = 229
229 + 63 = 445

5.The pattern is-
157.5 ÷ 3.5 = 45
45 ÷ 3 = 15
15 ÷ 2.5 = 6
6 ÷ 2 = 3
3 ÷ 1.5 = 2
2 ÷ 1 = 2 ≠ 1

6.The pattern is-
7 x 2 – 2 = 12
12 x 4 – (2+6) = 48 – 8 = 40
40 x 6 – (8 + 10) = 240 – 18 = 222
222 x 8 – (18 + 14) = 1776-32 = 1744 ≠ 1742
1744 x 10 – (32+18) = 17440 – 50 = 17390

7.The pattern is-
6 x 7 + 72 = 42 + 49 = 91
91 x 6 + 6 <sup2 = 546 + 36 = 582 ≠584
582 x 5 + 5 2 = 2910 + 25 = 2935
2935 x 4 + 4 2 = 11740 + 16 = 11756
11756 x 3 + 32 = 35268 + 9 = 35277

8.The pattern is-
9050 – 15 3 = 9050 – 3375 = 5675
5675 – 133 = 5675 – 2197 = 3478
3478 – 113 = 3478 – 1331 = 2147
2147 – 93 = 2147 – 729 = 1418
1418 – 73 = 1418 – 343 = 1075

9.The pattern is-
1 = 1
22 = 4
33 = 27 ≠ 25
44 = 256
55 = 3125
66 = 46656

10.The pattern is-
8424 ÷ 2 = 4212
4212 ÷ 2 = 2106
2106 ÷ 2 = 1053 ≠ 526.5
526.5 ÷ 2 = 263.25