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Quants Questions : Number Series Set 8

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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 !!!

  1. 5, 15, 65, 315, ?
    A)1556
    B)1565
    C)1665
    D)1656
    B) 1565
    Explanation :
    5*5 – 10 = 25 – 10 = 15
    15*5 -10 = 75 – 10 = 65
    65*5 – 10 = 325 – 10 = 315
    315*5 – 10 = 1575 – 10 = 1565

  2. 460, 92, 36.8, 22.08, ?
    A)17.664
    B)18.44
    C)16.33
    D)10.56
    A)17.664
    Explanation :
    460*(1/5) = 92
    92*(2/5) = 36.8
    36.8*(3/5) = 22.08
    22.08*(4/5) = 17.664

  3. 1023, 987, 915, 807, ?
    A)563
    B)543
    C)636
    D)663
    D)663
    Explanation :
    1023 – 36 = 987
    987 – 72 = 915
    915 – 108 = 807
    807 – 144 = 663

  4. 16, 33, 69, 126, ?
    A)257
    B)246
    C)206
    D)298
    C)206
    Explanation :
    16+(16*1+1) = 16+17 = 33
    33+(17*2+2) = 33 + 36 = 69
    69+(18*3+3) = 69+57 = 126
    126+(19*4+4) = 126+ 80 = 206

  5. 76, 517, 878, 1167, ?
    A)1392
    B)1932
    C)1832
    D)1672
    A)1392
    Explanation :
    76 + 21^2 = 76+441 = 517
    517 + 19^2 = 517+361 =878
    878 + 17^2 = 878 + 289 = 1167
    1167 + 15^2 = 1167 + 225 = 1392

  6. 300, 150, 90, 63, ?
    A)54.5
    B)45.6
    C)50.4
    D)34.6
    C)50.4
    Explanation :
    300*0.5 = 150
    150*0.6 = 90
    90*0.7 = 63
    63*0.8 = 50.4

  7. 8, 4, 4, 6, 12, ?
    A)39
    B)27
    C)24
    D)30
    D)30
    Explanation :
    8*(1/2) = 4
    4*(1) = 4
    4*(3/2) = 6
    6*(2) = 12
    12*(5/2) = 30

  8. 69, 77.28, 86.55, 96.936, ?
    A)102.546
    B)108.568
    C)105.675
    D)119.876
    B)108.568
    Explanation :
    69 + (12*69/100) = 69 + 8.28 = 77.28
    77.28 + (12*77.28/100) = 77.28 + 9.27 = 86.55
    86.55 + (12*86.55/100) = 86.55 +10.386 = 96.936
    96.936 + 11.632 = 108.568

  9. 980, 147, 28, 11, 8.57, ?
    A)12.653
    B)10.765
    C)8.224
    D)5.675
    C)8.224
    Explanation :
    980/7 + 7 = 147
    147/7 +7 = 28
    28/7 + 7 = 11
    11/7 + 7 = 8.57
    8.57 /7 +7 = 8.224

  10. 15, 32, 14, 30, 13, ?
    A)17
    B)26
    C)43
    D)28
    D)28
    Explanation :
    15*2 + 2 = 30+2 = 32
    32/2 – 2 = 14
    14*2+2 = 30
    30/2-2 = 13
    13*2+2 = 28