Addition/Subtraction
What has thirteen hearts, but no other organs?
A deck of cards
Where are the lakes always empty, the mountains always flat and the rivers always still?
A map
A man looks at a painting and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?
His son is in the painting.
What has many teeth but can’t bite?
A zipper.
What has a face and two hands but no arms or legs?
A chair.