I might be wrong but you tell me,
The father is 60 years old.
Son lives to be 60.
Total is 120.
Both die at the age of 60.
Could the son have been a newborn?
Idk. I don't understand it.
Wait, sum of present ages is 60. The son has to be younger by at least 20. Double it again. No, even then newborn is 0 and then 60= 60. Son lives toll he's 60 and dies, 120. Sorry, I tried. What are your possible choices?
