Four concepts. Three belong together. Spot the outsider and learn why.
Ten rounds. One answer per round. A correct pick is worth 100 points.
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Each of 10 rounds contains four items. Three share a relationship and one is the outsider. Pick the outsider to score the round.
Odd One Out can appear as one of the rotating Daily games. “Try first” lets you practise with different questions. Practice does not change your score, XP or streak.
There can be many ways to group four words. In this game, look for a relationship shared by three items and absent from the fourth. A vague association is less useful than a property you can explain clearly. Read all four before selecting the unusual-looking word.
Triangle, square, pentagon and circle form a simple practice set. The circle is the outsider because the other three have straight sides and vertices. “The one with the fewest sides” is less precise: a circle does not have straight sides in the same sense as a polygon. Good explanations identify the actual shared property.
Each round allows one answer, so test your rule before tapping. Afterwards, compare your reason with the explanation. If another item could be excluded under an equally natural rule, report the entire set and your alternative reasoning. That helps distinguish a useful puzzle from an ambiguous one.
This guide uses separate teaching examples. Report a question or suggest a correction with the game name and the wording you saw.