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  1. The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?

    2. A.

    3
    B.

    4
    C.

    9
    D.

    Cannot be determined
    E.

    None of these

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    Answer : Option B

    Explanation :

    Let the ten's digit be x and unit's digit be y.

     

    Then, (10x + y) - (10y + x) = 36

     

     9(x - y) = 36

     

     x - y = 4.

     

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