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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, 1 new)
Shapes (564 problems)
Geometry (719 problems)
General (671 problems)
Tricks (97 problems)
Word Problems (743 problems)
Cryptography (225 problems)
Numbers (2543 problems, 1 new)
Sequences (429 problems)
Games (181 problems)
Paradoxes (36 problems)
Riddles (210 problems)
Famous Riddles (48 problems)
Just Math (2615 problems, 2 new)
Calculus (217 problems)
Science (155 problems)
Algorithms (107 problems)
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