The difference of 2 digit number & the number obtained by interchanging the digits is 36. What is the difference the sum and the number if the ratio between the digits of the number is 1:2 ?	Pick
A) 6
B) 8
C) 9
D) 10
E) 12
Let the number be xy.   Given xy – yx = 36.   This means the number is greater is than the number got on reversing the digits.   This shows that the ten’s digit x &gt; unit digit y.   Also given ratio between digits is 1 : 2 =&gt; x = 2y   (10x + y) – (10y +x) = 36 =&gt; x – y = 4 =&gt; 2y – y =4.   Hence, (x + y) – (x – y) = 3y – y = 2y = 8   8
<result>B</result>
The difference of 2 digit number & the number obtained by interchanging the digits is 36. What is the difference the sum and the number if the ratio between the digits of the number is 1:2 ?