A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?
Why are 1990 dollar bills worth more than 1989 dollar bills?
Which is heavier, a pound of feathers or a pound of gold?
You are on a ship, over the side hangs a rope ladder with half meter rungs. The tide rises a half meter per hour. At the end of five hours, how much of the ladder will remain above the water assuming that nine rungs were above the water when the tide began to rise?
There are four girls, and four apples in a basket. Every girl takes an apple, yet one apple
remains in the basket? How is this possible?
