Date 29 April 2017
Number Series questions asked in 1st Slot:
1. 14 8 9 14.5 30 ___
Sol: 14 *0.5 +1 = 8
8* 1 + 1 = 9
9 * 1.5 + 1 = 14.5
14.5 * 2 + 1 = 30
30 * 2.5+1 = 76
2. 77 85 69 101 37 ___
Sol: 77 + 8 = 85
85 - 16 = 69
69 + 32= 101
101 -64 = 37
37+128 = 165
3. 20 29 54 103 184 ___
Sol: 20 + 32 = 29
29 + 52 = 54
54+ 72 = 103
103 + 92 = 184
184 + 112 = 305
4. 5 7 18 47 103 ___
Sol: It is based on difference of difference (2 11 29 56 92)
9 18 27 36
103+92 = 195
5. 7 8 18 57 ___ 1165
Sol: 7 *1+1 = 8
8* 2 +2 = 18
18*3 + 3 = 57
57* 4 +4 = 232
232 * 5+5 =1165
Number Series questions asked in 2nd Slot:
1. 12 7 8 13 27 __
Sol: 12 * 0.5 +1 = 7
7 * 1 + 1 = 8
8 * 1.5 + 1 = 13
13 * 2 + 1 = 27
27 * 2.5 + 1 = 68.5
2. 6 7 16 51 ____ 1045
Sol: 6*1 + 1 = 7
7 *2 + 2 = 16
16 * 3 + 3 = 51
51 * 4 + 4 = 208
208 * 5 + 5 = 1045
3. 4 7 17 41 86 ___
Sol: It is calculated using difference of difference
4 7 17 41 86 159
3 10 24 45 73
7 14 21 28
4. 16 25 50 99 180 ___
Sol: 16 + 32 = 25
25+ 52 = 50
50+ 72 = 99
99+ 92 = 180
180+ 112 = 301
5. 72 79 65 93 37 ___
Sol: 72 +7 = 79
79 – 14 = 65
65 + 28 = 93
93-56 = 37
37+112= 149
Number Series questions asked in 3rd Slot:
1. 16 9 10 16 33 ___
Sol: 16 * 0.5 +1= 9
9 *1 +1 = 10
10*1.5+1 = 16
16 * 2+1 = 33
33 * 2.5 +1 = 83.5
2. 5 6 14 45 __ 925
Sol: 5 * 1 + 1 = 6
6 * 2 + 2 = 14
14 * 3 + 3 = 45
45 * 4 + 4 = 184
184 * 5 + 5 = 925
3. 3 16 17 44 95 ___
Sol: It is calculated using difference of difference
3 16 17 44 95 178
3 11 27 51 83
8 16 24 32
4. 15 24 43 98 179 ___
Sol: 15 + 32 = 24
24 + 52 = 43
43 + 72 = 98
98 + 92 = 179
179 + 112= 300
5. 65 74 56 92 20 ___
Sol: 65 + 9 = 74
74 – 18 = 56
56 + 36 = 92
92 – 72 = 20
20 + 144= 164
30 April 2017
Number Series questions asked in 1st Slot
1. 9 8 14 39 __ 755
Sol: 9 * 1 – 1 = 8
8 * 2 – 2 = 14
14 * 3 – 3 = 39
39 * 4 – 4 = 152
152 * 5 – 5= 755
2. 25 32 21 34 17 __
Sol: Alternative pattern of – 4 and + 2 is adopted in this series
25 – 4 = 21 , 21- 4 = 17
32 + 2 = 34 , 34 +2 = 36
3. 11 6 7 12 11 __ 67.5
Sol: 11 * 0.5 + 0.5 = 6
6 * 1 + 1 = 7
7 * 1.5 +1.5 = 12
12 * 2 +2 = 26
26 * 2.5 + 2.5 = 67.5
4. 4 7 35 83 146 ___
Sol: 4 7 35 83 146 219
3 28 48 63 73
25 20 15 10
5. 521 496 447 366 245 ___
Sol: 521 – 52 = 496
496 – 72 = 447
447 - 92 = 366
366-112= 245
245 -132= 76
Number Series questions asked in 2nd Slot:
1. 13 12 22 63 __ 1235
Sol: 13 * 1 -1 = 12
12 * 2 – 2 = 22
22 * 3 – 3 = 63
63 * 4 - 4 = 248
248 * 5 - 5 = 1235
2. 399 390 365 316 235 ___
Sol: 399 – 32 = 390
390- 52 = 365
365 –72 = 316
316 – 92 = 235
235 - 112= 114
3. 13 7 8 13.5 ___ 75
Sol: 13 * 0.5 + 0.5 = 7
7 * 1 +1 =8
8 *1.5 +1.5 = 13.5
13.5 * 2 +2 = 29
29 * 2.5 + 2.5 = 75
4. 7 9 41 98 175 ___
Sol: The above is solved using difference of difference
7 9 41 98 175 267
+2 +32 +57 +77 +92
30 25 20 15
5. 29 36 25 38 21 __
Sol: Alternative pattern of – 4 and + 2 is followed in this series
29 – 4 = 25 , 25- 4 = 21
36 + 2 = 38 , 38 +2 = 40
These all questions are on memory Based.You might have observed that almost similar pattern was followed in Number Series questions on both the days. It is expected that similar pattern will be observed in Number series questions in IBPS EXAMS.
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