Aptitude Questions: Number Series Set 21

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 24 64 268 1324 ?
   a) 7922
   b) 7924
   c) 7964
   d) 7932
   e) None of these
   
   Answer & Explanation

   Answer – c) 7964
   Explanation :
   (10 * 2 + 4) = 24
   (24 * 3 – 8) = 64
   (64 * 4 + 12) = 268
   (268 * 5 -16) = 1324
   (1324 * 6 + 20) = 7964
   
   
   
2. 20 20 10 30 7.5 37.5 ?
   a) 3.25
   b) 6.25
   c) 9
   d) 12.25
   e) None of these
   
   Answer & Explanation

   Answer – b) 6.25
   Explanation :
   (20 * 1) = 20
   (20 ÷ 2) = 10
   (10*3) = 30
   (30 ÷ 4) = 7.5
   (7.5 * 5) = 37.5
   (37.5 ÷ 6) = 6.25
   
   
   
3. 147 151 160 176 201 ?
   a) 233
   b) 237
   c) 239
   d) 241
   e) None of these
   
   Answer & Explanation

   Answer – b) 237
   Explanation :
   (147+ 2^2) = 151
   (151 + 3^2) = 160
   (160 +4^2) = 176
   (176 + 5^2) = 201
   (201 + 6^2) = 237
   
   
   
4. 7 28 63 126 215 344 ?
   a) 512
   b) 513
   c) 511
   d) 514
   e) None of these
   
   Answer & Explanation

   Answer – c) 511
   Explanation :
   (2^3 – 1) = 7
   (3^3 + 1) = 28
   (4^3 – 1) = 63
   (5^3 + 1) = 126
   (6^3 – 1) = 215
   (7^3 +1) = 344
   (8^3 – 1) = 511
   
   
   
5. 50 51 51 53 106 109 327 ?
   a) 332
   b) 333
   c) 345
   d) 349
   e) None of these
   
   Answer & Explanation

   Answer – e) None of these
   Explanation :
   (50 +1) = 51
   (51 ×1) = 51
   (51 +2) = 53
   (53 ×2) = 106
   (106 +3) = 109
   (109*3) = 327
   (327 + 4) = 331
   
   
   
6. 26 25 26 31 42 61 ?
   a) 80
   b) 90
   c) 100
   d) 110
   e) None of these
   
   Answer & Explanation

   Answer –b) 90
   Explanation :
   26 +(1^2 – 2) = 25
   25 +(2^2 – 3) = 26
   26 + (3^2 – 4) = 31
   31 + ( 4^2 – 5) = 42
   42 + (5^2 – 6) = 61
   61 + (6^2 – 7) = 90
   
   
   
7. 1000 992 1019 955 1080 ?
   a) 880
   b) 882
   c) 864
   d) 890
   e) None of these
   
   Answer & Explanation

   Answer – c) 864
   Explanation :
   (1000 – 2^3) = 992
   (992 + 3^3) = 1019
   (1019- 4^3) = 955
   (955 + 5^3) = 1080
   (1080 – 6^3) = 864
   
   
   
8. 92 90 172 492 1904 ?
   a) 9360
   b) 9340
   c) 9350
   d) 9456
   e) None of these
   
   Answer & Explanation

   Answer – a) 9360
   Explanation :
   (92 – 2)*1 = 90
   (90 – 4)*2 = 172
   (172 – 8)*3 = 492
   (492 – 16)*4 = 1904
   (1904 – 32)*5 = 9360
   
   
   
9. 512 523 545 589 677 ?
   a) 853
   b) 953
   c) 753
   d) 653
   e) None of these
   
   Answer & Explanation

   Answer – a) 853
   Explanation :
   512 + 11 = 523
   523 + 22 = 545
   545 + 44 = 589
   589 + 88 = 677
   677 + 176 = 853
   
   
   
10. 16 18 30 60 116 206 ?
    a) 330
    b) 332
    c) 334
    d) 338
    e) None of these
    
    Answer & Explanation

    Answer – d) 338
    Explanation :
    16 + (1^2 + 1) = 18
    18 + (3^2 + 3) = 30
    30 + (5^2 + 5) = 60
    60 + (7^2 + 7) = 116
    116 + (9^2 + 9) = 206
    206 + (11^2 +11) = 338