The age of teacher is the same as the digit in the student's age, but in reverse order. In five years teacher will be twice as old as student will be then. what is the difference in their current age ?	Select the correct option
A) 18  B) 12  C) 25  D) 13  E) 7
Teacher's age= 10x+y so student's age= 10y+x..   after 5 years , 10x+y+5=2*(10y+x+5)....   so 5+19y=8x... check for odd values of y, y=1 satisfies the eqn with x=3... so ages are 31 and 13 and ans as found correctly by u is 18..18
<result>A</result>
The age of teacher is the same as the digit in the student's age, but in reverse order. In five years teacher will be twice as old as student will be then. what is the difference in their current age ?