A father tells his son, "I was of your present age when you were born." If the father is 36 now, how old was the boy 5 years back? Choose the correct choice from the following.
A) 15 years
B) 13 years
C) 17 years
D) 20 years
E) None of the above
present age of father 36   present age of son x   36-x=x   x=18   five yrs back sons age   18-5= 
<gadget id="calculator">  18-5</gadget>
<output>13</output>
13   ANSWER:13 years
<result>B</result>
A father tells his son, "I was of your present age when you were born." If the father is 36 now, how old was the boy 5 years back?