Practice Test Discussion

Q)

The difference between the two digit number and the number obtained by interchanging the two digits is 45. Which is the smaller of the two?

    • Explanation

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

    Then, (10x+y)-(10y+x)=45

    ⇒ 9(x-y)=45

    ⇒ x-y=5

    Given data is inadequate

    Hence, Option D is correct.

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