A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 42 years now, the son's age 5 years back was: Select the correct option.
A) 12 years. B) 14 years. C) 16 years. D) 17 years. E) 19 years.
Let the son's present age be x years. Then, (42 - x) = x   2x = 42.   x = 21   Son's age 5 years back (21- 5)= 
<gadget id="calculator">(21- 5)</gadget>
<output>16</output>
16 years.   ANSWER :16 years.
<result>C</result>
A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 42 years now, the son's age 5 years back was: