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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 (650 problems)
Liars and Knights (174 problems)
Weights and Scales (111 problems)
Probability (440 problems)
Shapes (489 problems)
Geometry (641 problems)
General (576 problems)
Tricks (90 problems)
Word Problems (618 problems, 1 new)
Cryptography (203 problems)
Numbers (1866 problems, 1 new)
Sequences (394 problems)
Games (160 problems)
Paradoxes (34 problems)
Riddles (186 problems)
Famous Riddles (45 problems)
Just Math (2024 problems, 1 new)
Calculus (168 problems)
Science (114 problems)
Algorithms (83 problems)
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