A slippery enigma.
Here is a speech between a father and his son. My father can I know your current age. The father answers: ah my son! When I had the age of your current age, you had yellow hair like the sun. The son insists, I want to know your age my father. The father replies: Well, you want to know my age!
- The sum of my current age with the age you had when I had the age of your current age is 40
- The sum of your current age with the age I will have when you have the age of my age is 60 or 120.
The son answers, now I know your age. Does the son lie?
I think the son lied because we normally find two solutions. What do you think
I think he is not lying.
x= age of father
y= age of son
x+(y-(x-y))=40
y+(x+(x-y)=60 or 120
y=20 and x=30 or x=60.
Although it is strange someone has a baby at the age of 10, if the father had been 60 years old, then at the age of 20 his son would not have existed, which contradicts the fact that the son had yellow hair when the father was 20 years old. So, the father is 30 years old.