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 70 years now, the son's age five years back was:  Pick:
A) 50 years.	B) 40 years.	C) 30 years.	D) 35 years.	E) 45 years.
Let the son's present age be x years. Then, (70 - x) = x   2x = 70.   x = 35.Let the son's present age be x years. Then, (38 - x) = x   2x = 38.   x = 19.   Son's age 5 years back (19 - 5)= 
<gadget id="calculator">(19 - 5)</gadget>
<output>14</output>
14 years.   Answer: Option A   Son's age 5 years back (35 - 5)= 
<gadget id="calculator">(35 - 5)</gadget>
<output>30</output>
30 years.   Answer: Option 30 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 70 years now, the son's age five years back was: