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Yes or No Marble Race
Start with Yes and No
A new list starts with one Yes marble and one No marble. Choose a map and press Start Race. The first marble to finish is your answer. If you have used this page before, it restores the choices you last saved in this browser.
Use Your Own Choices
Replace Yes and No with choices such as Pizza and Sushi, or add more options, one per line. You need at least two entries to start. This page saves its list separately from the other tools.
Repeat or Change the Race
Use Reset to return to setup, or Race Again after a race finishes. The speed controls let you watch at 1x, 2x, or 3x. A new race uses the same entries unless you edit them.
Understand the Result
The result comes from a physics simulation. One marble per option gives equal entry counts, but does not guarantee equal winning probabilities. Adding a suffix such as Yes*3 creates three Yes marbles; it does not specify an exact probability.