Question

2 dads and 2 sons sit around a table to eat. there is a bowl of apples on the table with 4 in it. each person takes one but theres still one left. how is this possible?

Answer 1

Simple. Grandfather, father, son.

Answer 2

Grandfather is dad to father, so there is one dad and one son
Father is dad to son, so there is your second dad and second son