An old man asked a mathematician to guess the ages of his three sons.
Old man said: “The product of their ages is 72.”
Mathematician said: “I need more information.”
Old man said:”The sum of their ages equals the house number of the house across the street.”
After a short while the mathematician said: “I need more information.”
Old man said: “The oldest son likes chocolate.”
Mathematician said: “I got it.”
What are the ages of the three sons of the old man?