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Aptitude Questions: Number Series Set 17

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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 !!!

Find the wrong number in the following series

  1. 16, 27, 44, 72, 96,131
    A.44
    B.72
    C.27
    D.96
    E.None of these
    Answer – B.72
    Explanation :
    16+11 = 27
    27+17 = 44….(11+6 = 17)
    44+23 = 67
    67+29 = 96
    96+35 = 131

  2. 43 , 52, 34, 61, 89, 70
    A.89
    B.70
    C.52
    D.61
    E.None of these
    Answer – A.89
    Explanation :
    43+(9*1) = 43+9 = 52
    52-(9*2) = 52-18=34
    34+(9*3) = 34+27 = 61
    61-(9*4) = 61-36 = 25
    25+(9*5) = 25+45 = 70

  3. 78,  38.5, 56.25, 138.125, 324.25
    A.56.25
    B.38.5
    C.138.125
    D.324.25
    E.None of these
    Answer – D.324.25
    Explanation :
    78*0.5-0.5 = 38.5
    38.5*1.5-1.5 = 56.25
    56.25*2.5-2.5 = 138.125
    138.125*3.5-3.5 = 479.94

  4. 512, 514, 528, 556, 612
    A.556
    B.612
    C.514
    D.528
    E.None of these
    Answer – D.528
    Explanation :
    512 + 2 = 514
    514+12 = 526………(12-2 =10+8 = 18+12 =30)
    526+30 = 556……..(18+8 = 26+30 = 56)
    556+56 = 612 = 612

  5. 157, 169.5, 194.5, 222, 282
    A.222
    B.282
    C.194.4
    D.169.5
    E.None of these
    Answer – A.222
    Explanation :
    157+12.5 = 169.5
    169.5+25 = 194.5
    194.5+37.5 = 232
    232+50 = 282

  6. 213, 220, 337, 697, 1761.5
    A.337
    B.697
    C.1761.25
    D.220
    E.None of these
    Answer – A.337
    Explanation :
    213*1+7 = 220
    220*1.5+11 = 330+11 = 341
    341*2+15 = 682+15 = 697
    697*2.5+19 = 1742.5+19 = 1761.5

  7. 3, 14, 23, 34, 47, 65
    A.23
    B.34
    C.47
    D.65
    E.None of these
    Answer – D.65
    Explanation :
    1*2+1 = 2+1 = 3
    3*4+2 = 12+2 = 14
    4*5+3 = 20+3 = 23
    5*6+4 = 30+4 = 34
    6*7+5 = 42+5 = 47
    7*8+6 = 56+6 = 62

  8. 13, 29.5, 121.5, 732.5, 5863.5
    A.5863.5
    B.732.5
    C.121.5
    D.29.5
    E.None of these
    Answer – E.None of these
    Explanation :
    13*2+3.5 = 26+3.5 = 29.5
    29.5*4+3.5 = 118+3.5 = 121.5
    121.5*6+3.5 = 729+3.5 = 732.5
    732.5*8+3.5 = 5860+3.5 = 5863.5

  9. 6, 12, 36, 96, 192, 384
    A.36
    B.96
    C.192
    D.384
    E.None of these
    Answer – A.36
    Explanation :
    6*2^0 = 6
    6*2^1 = 12
    6*2^3 = 48
    6*2^4 = 96
    6*2^5 = 192
    6*2^6 = 384

  10. 72, 73.4, 144, 436.2, 1739.2, 8689
    A.144
    B.8689
    C.436.2
    D.11739.2
    E.None of these
    Answer – B.8689
    Explanation :
    72*1+1.4 = 73.4
    73.4*2-2.8 = 144
    144*3+4.2 = 436.2
    436.2*4-5.6 = 1739.2
    1739.2*5+7 = 8703

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