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Below is the list of categories of puzzles and problems available on perplexus.info. If you think we are missing a category, feel free to let us know. Or just submit a problem, and if it fits none of the categories shown, we will be forced to add a new one just for you! Finally, if you're not sure which category to go to, just jump to a random problem.
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Home (Top Level)
Logic (734 problems)
Liars and Knights (190 problems)
Weights and Scales (121 problems)
Probability (538 problems)
Shapes (565 problems)
Geometry (719 problems)
General (671 problems)
Tricks (97 problems)
Word Problems (743 problems)
Cryptography (225 problems)
Numbers (2545 problems, 1 new)
Sequences (429 problems)
Games (181 problems)
Paradoxes (36 problems)
Riddles (210 problems)
Famous Riddles (48 problems)
Just Math (2617 problems, 2 new)
Calculus (217 problems)
Science (156 problems, 1 new)
Algorithms (107 problems)
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