Question:
How can FIVE minus two equal 4?
Answer:
Roman Numerals: FIVE take away F and E which leaves IV which is 4 in Roman Numerals.
Try another Brain Teaser:
A boy was rushed to the hospital emergency room. The ER doctor saw the boy and said, "I cannot operate on this boy. He is my son." But the doctor was not the boy's father. How could that be?