# Easy Reasoning Tricks – Imp Reasoning for Railway, Banking, SSC, Govt Exams

Easy Reasoning Tricks – Important for Railway, Banking, SSC and all other government exams :

Reasoning Easy Tricks – Class 2

Reasoning Easy TRICKS – CLASS 3

Easy Reasoning Tricks – Class 4

Easy Reasoning Tricks – Class 5

NUMBER SERIES RELATED QUESTIONS FOR BANK EXAMS IBPS PO, IBPS CLERK, SBI PO, SBI CLERK, RBI ASSISTANT

What should come at the place of question mark (?) in the following number series?

Q1 . 26, 12, 10, 16, ?
A. 50
B. 52
C. 53
D. 56
E. 57
Ans-  56
SOLUTION
26*.5 -1 = 12
12*1-2=  10
10*2 – 4= 16
16*4- 8= 56

Q2-30, 34, 43, 59, 84, 120,?

(1) 169
(2) 148
(3) 153
(4) 176
(5) None of these

Ans- 169
Solution: +22, 32, +42, + 62, +72
So, missing term is 169=120 +72

Q3-4, 4, 6, 12, 30, ?
1. 97
2. 92
3. 95
4. 98
5. 90

Ans- 90
Solution
4 * 1 = 4
4 * 1.5 = 6
6 * 2 = 12
12 * 2.5 = 30
30 * 3 = 90

Q4- 8, 9, 15, 32, ?, 250.5
1. 82.5
2. 47.5
3. 62.5
4. 37.5
5. 64.5

Ans- 82.5
Solution
8 * 1 + 1 = 9
9 * 1.5 + 1.5= 15
15 * 2 + 2 = 32
32 * 2.5 + 2.5 = 82.5
82.5 * 3 + 3 = 250.5

Q5-16, 19, 30, 57, 116, ?

1. 216

2. 333

3. 239

4. 236

5. 240

Ans- 239

Solution-

Difference  8, 16, 32, 64

Q6-2, 6, 16, 40, 96, ?
1. 224
2. 204
3.  211
4.  235
5.  253

Ans- 224

Solution-

2 × 2 + 2 = 6,
6 × 2 + 4 = 16,
16 × 2 + 8 = 40,
40 × 2 + 16 = 96
96 × 2 + 32 = 224

Q7-5, 6, 16, 57, 244, ?
1. 1115
2. 1245
3. 1239
4. 1188
5. 1252

Ans-1245

Solution-

5 × 1 + 1² = 6
6 × 2 + 2² = 16
16 × 3 + 3² = 57
57 × 4 + 4² = 244
244 × 5 + 5² = 1245

Q8- 15, ? , 35, 54, 79, 110, 147

1. 35

2. 22

3. 140

4. 110

5. 79

Ans- 22

Solution-

15, ? , 35, 54, 79, 110, 147

\/   \/   \/    \/    \/      \/

7, 13, 19, 25, 31, 37

\/   \/    \/   \/   \/

6   6    6    6   6

Q9 – 5, 30, 140, ? , 4380, 30695

1. 196

2. 325

3. 725

4. 884

5. None of these

Ans- 725

Solution-

= 5, 30, 140, ? , 4380, 30695

= In this series, we solve from right to left

= 30695 ÷ 7 – 5= 4380

= 4380 ÷ 6 – 5= 725

= 725÷ 5 – 5 = 140

= 140÷ 4 – 5 = 30

= 30 ÷ 3 – 5 = 25

Q10- 18, 19, 24, 38, ?, 123
1. 76
2.94
3. 85
4. 68
5. 106

Ans- 68
Solution

18 + 1 (=0 + 1²) = 19
19 + 5 (=1 + 2²) = 24
24 + 14 (=5 + 3²) = 38
38 + 30 (= 14 + 4²) = 68
68 + 55 (=30 + 5²) = 123

Q11-1, 7, 39, 165, 511, ?
1.1139
2. 1319
3. 1281
4. 1423
5. 1047

Ans- 1047
Solution-
1 × 6 + 1² = 7
7 × 5 + 2² = 39
39 × 4 + 3² = 165
165 × 3 + 4² = 511
511 × 2 + 5² = 1047

Q12-8, 19, 43, 82, 138, ?

1. 246
2. 221
3. 264
4. 251
5. 213

Ans- 213
Solution-
8 + 11 = 19
19 + 24 (= 11 + 13) = 43
43 + 39 (=24 + 15) = 82
82 + 56 (=39 + 17) = 138
138 + 75 (=56 + 19) = 213

Q13-286, 142, 70, 34, ?, 7
1. 15
2. 18
3. 16
4. 20
5.12

Ans- 16
Pattern:
(286/ 2) – 1=  142
(142/2) – 1=  70
(70/2) – 1 = 34
(34/2) – 1 = 16
(16/2) – 1 = 7

Q145, 12, ?, 41, 87, 214
1.19
2.35
3.22
4.26
5.None of these

Ans- 22
Solution-
5+7 = 12
12+(7+3=10) =22
22+(10+9=19) = 41
41+(19+27=46) = 87
87+(46+81=127) = 214

Q15-15, 29, 27, 53, 51, ?
1. 112
2. 101
3. 114
4. 120
5. 132

Ans- 101
Solution-
15 × 2 – 1 = 29,
29 × 1 – 2 = 27,
27 × 2 – 1 = 53,
53 × 1 – 2 = 51,
51 × 2 – 1 = 101

Q16-22, 12, 8, 21, 26, ?
1. 95
2. 90
3. 40
4. 58
5. 63

Ans- 90
Solution-
22 * 0.5 + 12  = 12
12 * 1 – 22  = 8
8 * 1.5 + 32  = 21
21 * 2 – 42  = 26
26 * 2.5 + 52 = 90

Q18-26, 13, 20, 51, 180, ?
1. 812
2. 728
3. 731
4. 624
5. 835

Ans- 812
Solution
*0.5 + 0, *1.5 + 0.5, *2.5 + 1, *3.5 + 1.5, *4.5 + 2

Q19-56, 60, 51, 67, 42, ?
1. 70
2. 88
3. 53
4. 62
5. 78

Ans- 78
Solution-
+ 22, – 32, + 42, – 52, + 62

Q20-  12, 5, 4, 5, ?

Ans- 9

Solution-

Difference of: x0.5-1, x1-1, x1.5-1, x2-1,

Q21- 11 10 18 51 ? 995

Ans- 200

Solution-

*1-1, *2-2, *3-3, *4-4, *5-5

Q22- 6 7 28 64 110 ? 216

Ans-161

Solution-

+20,+15, +10, +5, +0

Q23- 13 12 22 63 ?

Ans- 248

Solution-

*1-1, *2-2, *3-3, *4-4

Q24- 399 390 365 316 235 ?

Ans- 114

Solution-

-9 , -25, +49, -81, -121

Q25- 13, 7, 8, 13.5, ?, 75

Ans- 29

Solution-

×0.5+0.5, ×1+1, ×1.5+1.5, ×2+2, ×2.5+2.5

Q26- 7, 9, 41, 98, 175, ?

Ans-267

Solution-

5, 5, 5

Q27-15, 5, 4.5, 5.8.7.9, ?
1.9.6
2.11.42
3.12.23
4.10.74
5.None of these

Ans- 10.74
Solution-
15*0.2 +2 = 5
5*0.3+3 = 4.5
4.5*0.4+4 = 5.8
5.8*0.5+5 =7.9
7.9*0.6+6 = 10.74

Q28-29, ?, 79, 131, 201
1.61
2.76
3.37
4.45
5.None of these

Ans- 4.45

Solution-
29+(18*1-2) = 29+16 = 45
45+(18*2-2) = 45+34 = 79
79+(18*3-2) = 79+52 = 131
131+(18*4-2) = 131+70 = 201

Q30-211, 90, 171, 122, 147, 138, ?
1.152
2.176
3.139
4.180
5.None of these

Ans – 139
Solution-
211-11^2 = 90
90+9^2 = 171
171-7^2 = 122
122+5^2 = 147
147-3^2 = 138
138+1^2= 139

Q31-37, 54, 88, ?, 207
1.139
2.213
3.193
4.391
5.None of these

Ans- 139
Solution-
37+17 = 54
54+2*17 = 88
88+3*17 =139
139+4*17 = 207

Q32-13, 29, 48, 70, 95, ?
1.132
2.121
3.113
4.123
5.None of these

Ans- 123
Solution-
13+(9+7) = 29
29+(9+10) = 48
48+(9+13) =70
70+(9+16) = 95
95+(9+19) = 123

Q33- 4, ?, 14, 40, 88, 170
1.9
2.5
3.6
4.7
5.2

Ans- 6

Solution-
4 + 1² + 1 = 6
6 + 3² – 1 = 14
14 + 5² + 1 = 40
40 + 7² – 1 = 88
88 + 9² + 1 = 170

Q34- 3, 11, 47, 183, ?, 2947
1.775
2.770
3.765
4.783
5.739

Ans – 739

Solution-

3 * 4 – 1 = 11

11 * 4 + 3 = 47

47 * 4 – 5 = 183

183 * 4 + 7 = 739

739 * 4 – 9 = 2947

Q35- 4, 6, 8, 30, 112, ?
1.540
2.580
3.550
4.590
5.570

Ans – 570
Solution-
4 * 1 + 2 = 6
6 * 2 – 4 = 8
8 * 3 + 6 = 30
30 * 4 – 8 = 112
112 * 5 + 10 = 570

Q36- 10 5 5 10 40 ?
1.350
2.320
3.360
4.370
5.380

Ans- 320
Solution-
10 * 0.5 = 5
5 * 1 = 5
5 * 2 = 10
10 * 4 = 40
40 * 8 = 320

Q36-1, 2, 6, 17, ?, 157.5
1.40.5
2.42.5
3.49.5
4.51.5
5.50.5

Ans- 49.5
Solution-
1 * 1 + 1 = 2
2* 1.5 + 3 = 6
6 * 2 + 5 = 17
17 * 2.5 + 7 = 49.5
49.5 * 3 + 9 =157.5

Q37- 9, 8, 15, ?, 175, 874
1.42
2.24
3.38
4.44
5.14

Ans- 44
Solution-
9*1 – 1 = 8
8*2 – 1 = 15
15*3 – 1 = 44

Q37-2, 2, 12, 36, 104, ?
1.232
2.221
3.223
4.224
5.242

Ans- 224
Solution-

2 + 1³ – 1 = 2
2 + 2³ + 2 = 12
12 + 3³ – 3 = 36
36 + 4³ + 4 = 104

Q38- 3, ?, 7, 9, 11, 13
1.6
2.5
3.7
4.8
5.9

Ans- 5
Solution-
3*2 – 1 = 5
5*2 – 3 = 7
7*2 – 5 = 9

Q39- 6 7 9 13 26 37 69
1. 7
2. 26
3. 69
4. 37
5. 9

Ans- 26
Solution-

The number should be 21 in place of 26.
+1, +2, +4, +8, +16, +32

Q40-4 3 9 34 96 219 435
(1) 4
(2) 9
(3) 34
(4) 435
(5) 219

Ans- 1
Solution-

The series is 02+ 4, 12+2, 32+0, 62-2, 102-4, 152- 6,212 – 8…
Hence, 435 should be replaced with 433

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