Bit Banks and Model Questions in Arithmetic for Bank Exams

Sakshi Education

Number Series
What will come in place of the question mark (?) in each of the following number series?
1.   2, 8, 26, ?, 242
   1) 78   2) 72        3) 82
   4) 84   5) 242
A:   5; The series × 3 + 2
   2 ×3 + 2 = 8
   8 × 3 + 2 = 26
   26× 3 + 2 =80
   80× 3 + 2 = 242
2.   3, 4, 12, ?, 196
   1) 45   2) 40       3) 41   4) 49   5) None of these
A:   1; The given number series is ba-sed on the following pattern
   3 ×1 +1 = 4
   4 × 2 +4 = 12
   12 × 3 + 9 = 45
   45 × 4 + 16 = 196
3.   9, 17, ? , 65, 129
   1) 32   2) 24       3) 35   4) 33   5) None of these
A:   4; The series is ×2–1
   9×2 – 1 = 17
   17×2 – 1 = 33
   33×2 –1 = 65
   65×2 – 1 = 129
4.   7, 13, ? , 49, 97
   1) 27   2) 25       3) 23   4) 29   5) None of these
A:   2; The series is × 2 – 1
   7 ×2 –1 = 13
   13×2 –1 = 25
   25×2–1 = 49
   49×2–1 = 97
5.   5, 3, 6, ? , 64.75
   1) 15   2) 15.5       3) 17.5   4)    5) None of these
A:   3; The given number series is based on the following pattern.
   5× (1/2)+(1/2) = 3
   3× (3/2)+(3/2) = 6
   6× (5/2)+(5/2) = 17.5
   17.5× (7/2)+(7/2) = 64.5
6.   12, 6.5, 7.5, 12.75, 27.5, 71.25, ?
   1) 225.75   2) 216.75
   3) 209.75   4) 236.75
   5) 249.75
☛Follow our YouTube Channel (Click Here)
A:   2; The given number series is based on the following pattern
   12 × 0.5+0.5 = 6.5
   6.5×1+1 = 7.5
   7.5×1.5 + 1.5 =12.75
   12.75 × 2 +2 = 27.5
   27.5×2.5+ 2.5= 71.25 and
   71.25 ×3+ 3 = 216.75
   So the answer is 216.75
7.   16, 24, 36, 54, 81, 121.5, ?
   1) 182.25   2) 174.85
   3) 190.65   4) 166.55
   5) 158.95
A:   1; The given number series is based on the following pattern
   16× (3/2) = 8 × 3 = 24
   24× (3/2) = 12 × 3 = 36
   36× (3/2) = 18 × 3 = 54
   54× (3/2) = 27 × 3 = 81
   81× (3/2) = 121.5 then
   121.6× (3/2) = 182.25
   So the answer is 182.25
8.   12, 12, 18, 45, 180, 1170, ?
   1) 13485   2) 14675
   3) 15890   4) 16756
   5) 12285
A:   5; The given number series is based on the following pattern
   12 ×1 =12   12×1.5 =18
   18×2.5= 45   45× 4 = 180
   180×6.5 = 1170
   Here each number multiply with 1, 1.5, 2.5, 4, 6.5, –––
   In this series the sum of any two numbers is third number. So last number is 4+ 6.5 = 10.5, now last number multiply with 10.5
   1170×0.5 = 12285
9.   22, 23, 27, 36, 52, 77, ?
   1) 111       2) 109       3) 113   4) 117       5) 115
A:   3; Here given number series is based on the following pattern
   22+12=22+1=23
   23+22=23+4=27
   27+32=27+9=36
   36+42=36+16=52
   52+52=52+25=77 and
   77+62=77+36=113
10.   16, 14, 24, 66, 256, 1270, ?
   1) 85 2) 5672
   3) 4561 4) 7608    5) 6340
☛ Follow our Instagram Page (Click Here)
A:   4; The given number series is based on the following pattern
   16×1–2=14   14×2–4=24
   24×3–6=66   66×4–8=256
   256×5–10=1270 and
   1270×6–12=7608
11.   5, 11, 32, ?, 444
   1) 108       2) 109       3) 96   4) 98       5) None of these
A:   1; The given number series is based on the following pattern
   (5 + 6) ×1 = 11
   (11 + 5)×2 =32
   (32 + 4)×3 = 108
   (108 + 3)× 4 = 444
12.   7, 15, ?, 63, 127
   1) 32       2) 29       3) 33   4) 31       5) None of these
A:   4; The series ×2 + 1
   7 × 2 + 1 = 15
   15 × 2 + 1 = 31
   31 × 2 + 1 = 63
   63 × 2 + 1 = 127
13.   2, 3, 10, ?, 172
   1) 45       2) 39       3) 36   4) 42       5) None of these
A:   2; The given number series is based on the following pattern
   2 × 1 + 12 = 3
   3×2 + 22 = 10
   10×3 + 32 = 39
   39×4 + 42 = 172
14.   8, 4, 6, ?, 52.5
   1) 9       2) 12.5       3) 15   4) 16       5) None of these
A:   3; The series is ×0.5, ×1.5, ×2.5, × 3.5
   8 × 0.5 = 4   4 × 1.5 = 6
   6 × 2.5 = 15   15 × 3.5 = 52.5
15.   5, 6, ?, 45, 184
   1) 5       2) 12       3) 16   4) 9       5) None of these
A:   5; The series is (×n + n), Here n is natural number
   5 × 1 + 1 = 6       6 × 2 + 2 = 14
   14 × 3 + 3 = 45
   45 × 4 + 4 = 184
16.   9, 62, ?, 1854, 7415, 22244
   1) 433   2) 309       3) 406   4) 371   5) None of these
A:   4; The given number series is based on the following pattern
   9 × 7 - 1 = 62
   62 × 6 - 1 = 371
   371 × 5 - 1 = 1854
   1854 × 4 - 1 = 7415
   7415× 3 - 1 = 22244
17.   4, 8, 24, 60, ?, 224
   1) 178      2) 96   3) 109
   4) 141       5) None of these
A:   5; The given number series is based on the following pattern
   4 + 22 = 8   8 + 42 = 24
   24 + 62 = 60   60 + 82 = 124
   124 + 102 = 224
18.   8000, 1600, 320, 64, 12.8, ?
   1) 2.56       2) 3.5       3) 3.2   4) 2.98       5) None of these
A:   1; The series is ÷ 5
   8000 ÷ 5 = 1600
   1600 ÷ 5 = 320
   320 ÷ 5 = 64
   64 ÷ 5 = 12.8
   12.8 ÷ 5 = 2.56
19.   6, 9, 15, 27, 51, ?
   1) 84       2) 99       3) 123   4) 75       5) None of these
A:   2; The series is +3, +6, +12, +24, +48, ………
   6 + 3 = 9   9 + 6 = 15
   15 + 12 = 27   27 + 24 = 51
   51 + 48 = 99
20.   7, 8, 18, ?, 232, 1165
   1) 84       2) 42       3) 57   4) 36       5) None of these
A:   3; The series is (× n + n), Here n is natural number
   7 × 1 + 1 = 8
   8 × 2 + 2 = 18
   18 × 3 + 3 = 57
   57 × 4 + 4 = 232
   232 × 5 + 5 = 1165
21.   325, 314, 288, 247, 191, ?
   1) 126       2) 116       3) 130   4) 120       5) None of these
A:   4; The series is
   325, 314, 288, 247, 191, ?
   -11 -26 -41 -56 -71
   -15 -15 -15 -15
22.   45, 46, 70, 141, ?, 1061.5
   1) 353       2) 353.5
   3) 352.5   4) 352
   5) None of these
☛ Join our WhatsApp Channel (Click Here)
A:   2; The given number series is based on the following pattern
   45×1 + 1 = 46
   46 ×1.5+1 = 70
   70×2 + 1 = 141
   141×2.5+1 = 353.5
   353.5×3+1 = 1061.5
23.   620, 632, 608, 644, 596, ?
   1) 536       2) 556       3) 656   4) 646       5) None of these
A:   3; The given number series is based on the following pattern
   620 + 12 = 632
   632 – 24 = 608
   608 + 36 = 644
   644 – 48 = 596
   596 + 60 = 656
24.   15, 25, 40, 65, ?, 195
   1) 115       2) 90
   3) 105       4) 120
   5) None of these
A:   5; The given number series is based on the following pattern
   15× 2 – 5 = 25
   25× 2 – 10 = 40
   40×2 – 15 = 65
   65× 2 – 20 = 110
   110×2– 25 = 195
25.   120, 320, ?, 2070, 5195, 13007.5
   1) 800       2) 920
   3) 850       4) 900
   5) None of these
A:   5; The given number series is based on the following pattern
   120 × 2.5 + 20 = 320
   320 × 2.5 + 20 =820
   820 × 2.5 + 20 = 2070
   2070 × 2.5 + 20 = 5195
   5195×2.5 + 20 = 13007.5
26.   9, 19, 40, 83, ?, 345, 696
   1) 162       2) 170       3) 175   4) 166       5) None of these
A:   2; The given number series is based on the following pattern
   9× 2 + 1 = 19
   19 × 2 + 2 = 40
   40× 2 + 3 = 83
   83 × 2 + 4 = 170
   170 × 2 + 5 = 345
   345 × 2 + 6 = 696
27.   980, 484, 236, 112, 50, ?, 3.5
   1) 25       2) 17       3) 21   4) 29       5) None of these
A:   5; The given series is (÷2 - 6)
   980 ÷2 - 6 = 484
   484 ÷2 - 6 = 236
   236 ÷2 - 6 = 112
   112 ÷2 - 6 = 50
   50 ÷2 - 6 = 19
   19 ÷2 - 6 = 3.5
28.   8, 9, 20, 63, 256, 1285, ?
   1) 6430   2) 7450
   3) 7716   4) 7746
   5) None of these
A:   3; The given series is (× n + n), n is natural number
   8 × 1 + 1 = 9
   9 × 2 + 2 = 20
   20 × 3 + 3 = 63
   63 × 4 + 4 = 256
   256 × 5 + 5 = 1285
   1285× 6 + 6 = 7716
29.   1015, 508, 255, 129, 66.5, ?, 20.875
   1) 34.50   2) 35
   3) 35.30   4) 35.75
   5) None of these
A:   4; The given number series is based on the following pattern
   (1015 + 1) ÷ 2 = 508
   (508 + 2) ÷ 2 = 255
   (255 + 3) ÷ 2 = 129
   (129 + 4) ÷ 2 = 66.5
   (66.5+5) ÷ 2 = 35.75
   (35.75+6) ÷ 2 = 20.875
☛ Join our Telegram Channel (Click Here)
30.   12, 12, 18, 36, 90, 270, ?
   1) 945       2) 810
   3) 1080   4) 1215
   5) None of these
A:   1; The given series is ×1, ×1.5, ×2, ×2.5, ×3, …
   12 × 1 = 12
   12 × 1.5 = 18
   18 × 2 = 36
   36 × 2.5 = 90
   90 × 3 = 270
   270× 3.5 = 945