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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 (712 problems)
Liars and Knights (189 problems)
Weights and Scales (120 problems)
Probability (508 problems, 2 new)
Shapes (527 problems)
Geometry (684 problems)
General (643 problems, 1 new)
Tricks (95 problems)
Word Problems (724 problems)
Cryptography (219 problems)
Numbers (2329 problems, 1 new)
Sequences (423 problems)
Games (175 problems)
Paradoxes (36 problems)
Riddles (203 problems)
Famous Riddles (48 problems)
Just Math (2338 problems)
Calculus (201 problems)
Science (150 problems)
Algorithms (105 problems)
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