Aptitude Questions: Number Series Set 22

Hello Aspirants. Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!

Questions Penned by Yogit

1. 10 13 20 33 54 ?
   a) 82
   b) 83
   c) 84
   d) 85
   e) None of these
   
   Answer & Explanation

   Answer – d) 85
   Explanation :
   10 + (2^2 – 1) = 13
   13 + (3^2 -2) = 20
   20 + (4^2 -3) = 33
   33 + (5^2 – 4) = 54
   54 + (6^2 – 5) = 85
   
   
   
2. 10 52 253 1006 3013 ?
   a) 5022
   b) 6022
   c) 7022
   d) 8022
   e) None of these
   
   Answer & Explanation

   Answer – b) 6022
   Explanation :
   10*6 -8 = 52
   52 *5 – 7 = 253
   253 *4 – 6 = 1006
   1006 *3 – 5 = 3013
   3013 *2 – 4 = 6022
   
   
   
3. 50 25 25 50 200 1600 ?
   a) 25200
   b) 25300
   c) 25600
   d) 17800
   e) None of these
   
   Answer & Explanation

   Answer – c) 25600
   Explanation :
   50*(1/2) = 25
   25 *1 = 25
   25 *2 = 50
   50 *4 = 200
   200 *8 = 1600
   1600 *16 = 25600
   
   
   
4. 20 23 51 160 651 ?
   a) 3268
   b) 3264
   c) 3246
   d) 3278
   e) None of these
   
   Answer & Explanation

   Answer – a) 3268
   Explanation :
   20*1 + 3 = 23
   23*2 + 5 = 51
   51*3 + 7 = 160
   160*4 + 11 = 651
   651*5 + 13 = 3268
   
   
   
5. 100 200 250 275 287.5 ?
   a) 291.75
   b) 292.75
   c) 294.75
   d) 279.75
   e) None of these
   
   Answer & Explanation

   Answer – e) None of these
   Explanation :
   +100, +50, +25, +12.50, + 6.25 (divide the difference by 2)
   
   
   
6. 36 39 48 63 84 111 ?
   a) 141
   b) 142
   c) 143
   d) 144
   e) None of these
   
   Answer & Explanation

   Answer – d) 144
   Explanation :
   36 + 3*1 = 39
   39 + 3*3 = 48
   48 + 3*5 = 63
   63 + 3*7 = 84
   84 + 3*9 = 111
   111 + 3*11 = 144
   
   
   
7. 45 89 265 1057 5281 ?
   a) 31689
   b) 31681
   c) 31481
   d) 38241
   e) None of these
   
   Answer & Explanation

   Answer – b) 31681
   Explanation :
   45*2 – 1 = 89
   89*3 – 2 = 265
   265*4 – 3 = 1057
   1057*5 – 4 = 5281
   5281*6 -5 = 31681
   
   
   
8. 90 93 102 129 210 ?
   a) 423
   b) 443
   c) 453
   d) 463
   e) None of these
   
   Answer & Explanation

   Answer – c) 453
   Explanation :
   90 + 3^1 = 93
   93 + 3^2 = 102
   102 + 3^3 = 129
   129 + 3^4 = 210
   210 + 3^5 = 453
   
   
   
9. 61 124 246 494 986 ?
   a) 1972
   b) 1976
   c) 1974
   d) 1978
   e) None of these
   
   Answer & Explanation

   Answer – c) 1974
   Explanation :
   61*2 +2 = 124
   124*2 – 2 = 246
   246*2 + 2 = 494
   494*2 – 2 = 986
   986*2 +2 = 1974
   
   
   
10. 26 65 124 217 342 ?
    a) 511
    b) 512
    c) 513
    d) 514
    e) None of these
    
    Answer & Explanation

    Answer – c) 513
    Explanation :
    3^3 – 1, 4^3 +1, 5^3 -1, 6^3+1, 7^3 -1, 8^3 +1