Menu
Home / Arithmetic Aptitude / Problems on Numbers :: Discussion

Discussion :: Problems on Numbers

  1. The difference between a two-digit number and the number obtained by interchanging the position of the digits is 45. What is the difference between digits of that number?

    2. A.
    6
    B.
    5
    C.
    7
    D.
    Data inadequate.

    View Answer

    Workspace

    View Answer

    Answer : Option B

    Explanation :

    Let the number be = xy
    so the ten's digit = x
    Unit's digit = y
    So, the number is = 10x +y
    Number obtained by interchanging the digits = 10y + x
    According to the question:
    (10x + y) - (10y + x) = 45
    10x + y - 10y - x = 45
    9x - 9y = 45
    9(x - y) = 45
    X - Y = 5
    ∴The difference between the digits of the numbers: (x - y) = 5

Write your comments here:

Be The First To Comment