If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

The problem of making a table that takes up a small space but provides a large tabletop has been solved in many ways. In the 18th century, especially in the South, where homes were made with large, ...

Strike a billiard ball on a frictionless table with no pockets so that it never stops bouncing off the table walls. If you returned years later, what would you find? Would the ball have settled into ...

Long Beach residents responded to the invitation to problem-solve with their neighbors on Saturday — all over town. In Los Cerritos, retirement-aged residents talked about ways to help the homeless ...