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Past puzzles
Every puzzle from launch onward. Solved ones show a checkmark — pick up where you left off.
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- #952026-09-09Iteration
- #942026-09-08Classes
- #932026-09-07Mutability
- #922026-09-06Iteration
- #912026-09-05Strings
- #902026-09-04Mutability
- #892026-09-03Strings
- #882026-09-02Regex
- #872026-09-01Arrays
- #862026-08-31Hashes
- #852026-08-30Arrays
- #842026-08-29Regex
- #832026-08-28Comparisons
- #822026-08-27Blocks
- #812026-08-26Regex
- #802026-08-25Comparisons
- #792026-08-24Comparisons
- #782026-08-23Arrays
- #772026-08-22Classes
- #762026-08-21Iteration
- #752026-08-20Blocks
- #742026-08-19Blocks
- #732026-08-18Blocks
- #722026-08-17Exceptions
- #712026-08-16Classes
- #702026-08-15Comparisons
- #692026-08-14Classes
- #682026-08-13Arrays
- #672026-08-12Iteration
- #662026-08-11Modules
- #652026-08-10Iteration
- #642026-08-09Strings
- #632026-08-08Strings
- #622026-08-07Mutability
- #612026-08-06Iteration
- #602026-08-05Numbers
- #592026-08-04Arrays
- #582026-08-03Strings
- #572026-08-02Numbers
- #562026-08-01Hashes
- #552026-07-31Classes
- #542026-07-30Strings
- #532026-07-29Modules
- #522026-07-28Classes
- #512026-07-27Symbols
- #502026-07-26Regex
- #492026-07-25Numbers
- #482026-07-24Mutability
- #472026-07-23Classes
- #462026-07-22Iteration
- #452026-07-21Strings
- #442026-07-20Mutability
- #432026-07-19Strings
- #422026-07-18Arrays
- #412026-07-17Hashes
- #402026-07-16Mutability
- #392026-07-15Classes
- #382026-07-14Strings
- #372026-07-13Mutability
- #362026-07-12Regex
- #352026-07-11Arrays
- #342026-07-10Comparisons
- #332026-07-09Numbers
- #322026-07-08Numbers
- #312026-07-07Classes
- #302026-07-06Truthiness
- #292026-07-05Arrays
- #282026-07-04Numbers
- #272026-07-03Classes
- #262026-07-02Mutability
- #252026-07-01Mutability
- #242026-06-30Hashes
- #232026-06-29Strings
- #222026-06-28Classes
- #212026-06-27Comparisons
- #202026-06-26Classes
- #192026-06-25Numbers
- #182026-06-24Hashes
- #172026-06-23Iteration
- #162026-06-22Numbers
- #152026-06-21Iteration
- #142026-06-20Comparisons
- #132026-06-19Numbers
- #122026-06-18Numbers
- #112026-06-17Exceptions
- #102026-06-16Numbers
- #92026-06-15Numbers
- #82026-06-14Arrays
- #72026-06-13Blocks
- #62026-06-12Mutability
- #52026-06-11Symbols
- #42026-06-10Iteration
- #32026-06-09Arrays
- #22026-06-08Iteration
- #12026-06-07Iteration