► A man has to be at work by 10:00 in the morning. It takes him 20 minutes to get dressed, 15 minutes to eat his breakfast, and 20 minutes to walk to work. What time should he get up?
► Given a cube, draw a second figure with a square base, having 8 edges, 5 vertices, and 5 faces.
► How many squares are there on a chessboard?