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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 (576 problems)
Liars and Knights (164 problems)
Weights and Scales (100 problems)
Probability (368 problems)
Shapes (397 problems, 2 new)
Geometry (498 problems)
General (510 problems)
Tricks (81 problems)
Word Problems (454 problems)
Cryptography (192 problems)
Numbers (1357 problems)
Sequences (323 problems, 1 new)
Games (142 problems)
Paradoxes (34 problems)
Riddles (181 problems)
Famous Riddles (39 problems)
Just Math (1613 problems, 1 new)
Calculus (139 problems)
Science (98 problems)
Algorithms (72 problems)
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