A father was as old as his son's present at the time of your birth. If the father's age is 38 years now, the son's age seven years back was?  Answers:
A) 10 years B) 12 years C) 14 years D) 16 years E) 18 years
Let the son's present age be x years. Then, (38 - x) = x   2x = 38.   x = 19.   Son's age 5 years back (19 - 7)= 
<gadget id="calculator">(19 - 7)</gadget>
<output>12</output>
12 years.   12 years
<result>B</result>
A father was as old as his son's present at the time of your birth. If the father's age is 38 years now, the son's age seven years back was?