Multiple Choice Questions on Series I 8 9 15 25 42 68 105 Series II 60 180 450 900 1350 1380 675 If wrong term in serie........... for IBPS (PO/SO) Preparation

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Multiple Choice Questions

Series I 8 9 15 25 42 68 105 Series II 60 180 450 900 1350 1380 675 If wrong term in serie...........

Quantitative Aptitude(IBPS PO) Number series
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    Series I: 8, 9, 15, 25, 42, 68, 105
    Series II: 60, 180, 450, 900, 1350, 1380, 675
     
     If wrong term in series II is ‘N’, then which statement is true about (N/30 + 1)?
    (i) It’s a prime number.
    (ii) Sum of the digits is less than 9.
    (iii) It’s a nearest multiple of 5 and its remainder is 4.
     

    Only (ii) and (iii) follow

    Incorrect Answer

    Only (i) and (ii) follow

    Incorrect Answer

    Only (i) follow

    Correct Answer

    Non follow

    Incorrect Answer

    All (i), (ii) and (iii) follow

    Incorrect Answer
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    Explanation:
    Wrong term = 1380
    Pattern of series –
    60 ×3=180
    180 ×2.5=450
    450 ×2=900
    900 ×1.5=1350
    1350 ×1=1350
    1350 ×0.5=675
    (i) 138030 + 1 = 47
    47 is a prime number, so statement (i) following
    (ii) 1380/30 + 1 = 47
    Sum of digits = 4 + 7 = 11
    And, 11 > 9
    So, statement (ii) did not follow
    (iii) 1380/30 + 1 = 47
    475, remainder is 2 not 4
    So, statement (iii) did not follow

    By: Munesh Kumari
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