Here is a synopsis of some of the basic rules of table tennis, a.k.a. ping-pong, according to the website PongWorld:
A regulation table-tennis game is played on a table that should be 2.74 meters long, 1.525 meters wide, and 0.76 meters high. The ball should be orange or white, 40 mm in size, and made of celluloid or a similar plastic material. The paddle should have a red side and a black side.
In a singles game, a player who serves the ball must toss it at least six inches from an opened-hand palm and then swat it to bounce on his side of the table and then over or around a net that runs across the center of the table. The opposing player hits it back after it has bounced on the table on his side of the net. Each player serves two times and then switches serve.
A point is scored when an opponent fails to make a correct service, or an opponent fails to make a correct return. The first player to score 11 wins the game, but if a 10-10 tie is reached, the winner must win by two points. If the ball hits the net, or if the receiver is not ready to receive the ball, it's called a “let.” No point is given, and the server serves again.
In a doubles game, two players are situated opposing two other players at each end of the table. A player puts a ball in play and an opposing player returns it to the server’s partner; then that player returns it to the opposing player’s partner. They keep alternating play in that sequence. The scoring is the same as in a singles game.