Practice Test Discussion

Q)

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 ?

[Canara Bank (PO), 2003]

    • Explanation

    Let the two digit number be 10x+y and the number by interchanging the position of the digits =10y+x

    Now, 10x+y-(10y+x)=36

    ⇒ 9x-9y=36

    ⇒ x-y=4

    Hence, Option A is correct.

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