-- advertisement --

Discussion

  1. The sum of the digits of a two digit number is 10, when the number is reversed, the number increases by 72.Find the number.
    1. 64
    2. 82
    3. 19
    4. 37
  1. Correct Option: C

    By checking options
    91-19=72

    Or

    Let the number be xy
    So 10x + y = 10 ..... (i)

    When the number is reversed the new number is yx
    So (10y + 10 ) - ( 10x +y ) = 72 ....(ii)

    From Eqs. (i) & (ii)
    x = 1 and y =9
    ∴number = 19


Your comments will be displayed only after manual approval.

-- advertisement --

-- advertisement --