Task: Question Answering
Input (English): Problem: the difference between a two digit number and the number obtained by interchanging the digits is 36 . what is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ? 
Options: a ) 4 , b ) 8 , c ) 12 , d ) 16 , e ) 18
Output (English): b