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  1. If (225)Y = (165)8 find value of Y

    2. A.
    7
    B.
    8
    C.
    9
    D.
    11

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    Answer : Option A

    Explanation :

    (225)y => 2Y2 + 2Y + 5 = (165)8 => (117)10

    ∴ 2Y2 + 2Y + 5 = 117

    Y2 + Y - 56 = 0

    ∴ Y = 7 or Y = - 8

    ∴ Y should be 7.

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