A father said to his son, "I was as old as you are at the present at the time of your birth". If the fathers age is 38 years now, the sons age five years back was:
14 years
19 years
33 years
38 years
Explanation:
Let the sons present age be $ x $ years. Then,$\left (38 - x\right)$ = $ x $
$\Rightarrow$ 2$ x $ = 38.
$\Rightarrow x $ = 19.
$\therefore$ Sons age 5 years back (19 - 5) = 14 years.