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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 (534 problems)
Shapes (562 problems)
Geometry (718 problems)
General (670 problems)
Tricks (97 problems)
Word Problems (742 problems)
Cryptography (225 problems)
Numbers (2537 problems, 1 new)
Sequences (429 problems)
Games (180 problems)
Paradoxes (36 problems)
Riddles (210 problems)
Famous Riddles (48 problems)
Just Math (2602 problems, 3 new)
Calculus (216 problems)
Science (155 problems)
Algorithms (107 problems)
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