A police officer saw truck driver clearly going the wrong way down a one-way street, but did not try to stop him. Why not?
The truck driver was walking.
From book: Great Lateral Thinking Puzzles - Paul Sloane & Des MacHale
A man wishes to reach the island in the middle of an ornamental lake without getting wet. The island is 20 feet from each edge of the pond (see diagram) and he has two planks each 17 feet long. How does he get across?
He lays the planks as shown in this diagram.
From book: Puzzles To Challenge Your Mind - Paul Sloane & Des MacHale