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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 (727 problems, 1 new)
Liars and Knights (190 problems)
Weights and Scales (121 problems)
Probability (521 problems)
Shapes (550 problems, 1 new)
Geometry (703 problems)
General (661 problems)
Tricks (97 problems)
Word Problems (738 problems)
Cryptography (224 problems)
Numbers (2464 problems, 2 new)
Sequences (428 problems)
Games (177 problems)
Paradoxes (36 problems)
Riddles (209 problems)
Famous Riddles (48 problems)
Just Math (2514 problems, 2 new)
Calculus (207 problems)
Science (150 problems)
Algorithms (107 problems)
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