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?

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=13
  
• 8 years agoHelpfull: Yes(6) No(1)
• ans 13
  simple trick, for this kind of ques divide the father age by 2 and subtract the ques given
  ie.,
  f/2=36/2=18
  then,look up the ques and subtract the given years 18-5=13
  
  
  use this method for all this type ques
• 8 years agoHelpfull: Yes(2) No(0)