Week 5 Day 5: The Grain of Rice on the Chessboard

Place one grain of rice on the first square of a chessboard. Double it each square. By square 64, you need 18 quintillion grains -- more than all the rice ever grown....

Place one grain of rice on the first square of a chessboard. Double it each square. By square 64, you need 18 quintillion grains -- more than all the rice ever grown.