Andy, Barry, and Carl race each other in a 100-meter dash. They each run at a constant speed throughout the sprint. Andy beats Barry by 20 meters, and Barry beats Carl by 20 meters. How many meters does Andy beat Carl by?
A sheik announced that a race would decide which of his two sons would inherit all his wealth. The sons were to ride their camels to a certain distant city. The son whose camel reached the city last would be given all the sheik's wealth.
The two sons set out on the journey. After several days of aimless wandering, they met and agreed to seek the advice of a wise man. After listening to the wise man's advice, the two sons rode the camels as quickly as possible to the designated city.
What was it that the wise man told the two sons? They did not agree to split the wealth, and their father's decree would be followed.