A plane with 4 people on board is about to crash. The 4 people are the pilot, the president, the world’s smartest man and a ten-year-old. They only have 3 parachutes between them.
The president cries: “I’m the president, people need me to live!” and he jumps out.
The world’s smartest man cries, “I’m the world’s smartest man, I’m needed in the world!” and he jumps out.
The pilot sighs and says, “You take the last parachute, kid, I’ll go down with the plane, that’s my job.”
The kid smiles, “No need, there are still two parachutes left. The world’s smartest man took my backpack.”