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Last Updated: May 10, 2011

Play 21 Bell Slot Machine for Free


The game Applet failed to run because we were unable to find your Java plug-in. In order to play this game you must first download and install the latest Java plugin.

Note: Java is not compatible on iPhone, iPad, and the latest versions of Google Chrome.

About This Slot

Following is a respresentation of the 21 Bell Slot Machine, © 1973. A mathematical analysis of this slot can be found in my slot machine appendix 5.

My source for the design of this game is Brett Niver of Kent State University. My brother found the design as part of one of the professor’s homework assignments. Professor Niver credits John Scarne, Scarne’s New Complete Guide to Gambling, New York: Simon and Schuster, 1974, as the original source.

More on Slots

I have lots more information about slot machines and how they work in my slot machine section.

Questions and Answers

See questions I’ve answered about slot machines from my Ask the Wizard columns.