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 five years back ?  Choose the most appropriate option:
A) 13 B) 15 C) 17 D) 20 E) 22
F is fathers age and B is Boys age   F-B=B, F=2B   2B=36, B=18   Boys age 5 years back would be 13   13NSWER:13
<result>A</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 five years back ?