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Quants Questions : Number Series Set 12

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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. 7,9,15,27, ?
    A)74
    B)47
    C)63
    D)59
    E)None of these
    B)47
    Explanation :
    7+(12+1) = 7+2 = 9
    9+(22+2) = 9+6 = 15
    15+(32+3) = 15+12 = 27
    27+(42+4) =27+20 = 47

  2. 63, 64.8, 67, 69.6 , ?
    A)91.4
    B)81.2
    C)72.6
    D)76.3
    E)None of these
    C)72.6
    Explanation :
    63+1.8 = 64.8
    64.8+2.2 = 67
    67+2.6 = 69.6
    69.6+3 =72.6

  3. 19, 36, 70, 121, ?
    A)234
    B)197
    C)213
    D)189
    E)None of these
    D)189
    Explanation :
    19+17 = 36
    36+34 = 70
    70+51 = 121
    121+68 = 189

  4. 121, 120, 116, 107, 91, ?
    A)73
    B)45
    C)53
    D)66
    E)None of these
    D)66
    Explanation :
    121 – 12  = 121-1 = 120
    120 – 22  = 120 -4 = 116
    116- 32 = 116-9 = 107
    107-42 = 107 – 16 = 91
    91 – 52 = 91 – 25 = 66

  5. 213, 217, 210, 214, 207, 211, ?
    A)215
    B)245
    C)204
    D)323
    E)None of these
    C)204
    Explanation :
    213 +4 = 217
    217 – 7 = 210
    210+4 = 214
    214-7 = 207
    207+4 = 211
    211-7 = 204

  6. 816, 812, 404, 1200, 299, ?
    A)1324
    B)1475
    C)1275
    D)1534
    E)None of these
    B)1475
    Explanation :
    (816 – 4)*1 = 812
    (812 – 4)÷2 = 404
    (404 – 4)*3 = 1200
    (1200 – 4)÷4 = 299
    (299 – 4)*5 = 1475

  7. 124, 120.5, 113.5, 103, 89, ?
    A)78.4
    B)65.4
    C)71.5
    D)81.5
    E)None of these
    C)71.5
    Explanation :
    124 – 3.5 = 120.5
    120.5 – 7 = 113.5
    113.5-10.5 = 103
    103 – 14 = 89
    89 – 17.5 = 71.5

  8. 725, 724, 716, 689, 625, ?
    A)750
    B)528
    C)465
    D)500
    E)None of these
    D)500
    Explanation :
    725 – 13 = 724
    724 – 8 = 716
    716 – 27 = 689
    689 – 64 = 625
    625 – 125 = 500

  9. 17, 22.5, 50.5, 157, 633.5, ?
    A)3173
    B)2345
    C)1347
    D)2457
    E)None of these
    A)3173
    Explanation :
    17*1 + 5.5 = 22.5
    22.5*2+5.5 = 50.5
    50.5*3+5.5 = 157
    157*4+5.5 = 633.5
    633.5*5+5.5 = 3173

  10. 2, 13, 35, 79, 167, ?
    A)416
    B)343
    C)321
    D)257
    E)None of these
    B)343
    Explanation :
    2+11 = 13
    13+22 = 35
    35+44 = 79
    79+88 = 167
    167+176 = 343