A two digit number, digits interchange places and the new number is added to the original number, then the resulting number will be divisible by?	Select:
A) 10
B) 11
C) 13
D) 15
E) 16
Let the ten's digit be x and unit's digit be y.   Then, number = 10x + y.   Number obtained by interchanging the digits = 10y + x.   (10x + y) + (10y + x) = 11(x + y), which is divisible by 11.   11
<result>B</result>
A two digit number, digits interchange places and the new number is added to the original number, then the resulting number will be divisible by?