IN A 2DIGIT NO., TEN'S DIGIT IS TWICE THE UNIT'S DIGITS. THE NO. FORMED BY INTERCHAMGING THE DIGITS IS 36 LESS THAN THE ORIGINAL NO.. THE NO. IS.............?
Let the unit digit be x.
then, the ten 's digit is 2x
and the number is
By interchanging the digits, 10 's digit becomes x and unit digit becomes 2x
New number
According to the question,
Therefore, the number is 84