Practice Test Discussion

Q)

The number obtained by interchanging the two digits of a two digit number is less than the original number by 27. If the difference between the two digits of the number is 3, then what is the original number?

[Union Bank of India (PO), 2005]

    • Explanation

    Let the obtained number be 10x+y

    The number obtained by interchanging the position of the digits =10y+x

    Again, difference = 9x-9y

    Now, 9x-9y=27

    x-y=3

    But, here all the given options fulfill this condition.

    Hence, we cannot determine an exact answer.

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