12 Days of Christmas
            
                        
                    
                        
                    25th
                        
                    
        
            24 Game
            
                        
                    
                        
                    47th
                        
                    
        
            99 Bottles of Beer
            
                        
                    
                        
                    17th
                        
                    
        
            Abundant Numbers (Long)
            
                        
                    
                        
                    80th
                        
                    
        
            Arabic to Roman
            
                        
                    
                        
                    144th
                        
                    
        
            Arithmetic Numbers
            
                        
                    
                        
                    163rd
                        
                    
        
            Arrows
            
                        
                    
                        
                    24th
                        
                    
        
            Ascending Primes
            
                        
                    
                        
                    83rd
                        
                    
        
            ASCII Table
            
                        
                    
                        
                    57th
                        
                    
        
            Billiards
            
                        
                    
                        
                    303rd
                        
                    
        
            brainfuck
            
                        
                    
                        
                    32nd
                        
                    
        
            Card Number Validation
            
                        
                    
                        
                    37th
                        
                    
        
            Catalan Numbers
            
                        
                    
                        
                    308th
                        
                    
        
            Catalan’s Constant
            
                        
                    
                        
                    525th
                        
                    
        
            Christmas Trees
            
                        
                    
                        
                    13th
                        
                    
        
            Collatz
            
                        
                    
                        
                    85th
                        
                    
        
            CSS Colors
            
                        
                    
                        
                    37th
                        
                    
        
            Cubes
            
                        
                    
                        
                    9th
                        
                    
        
            Day of Week
            
                        
                    
                        
                    1st
                        
                    
        
            DFA Simulator
            
                        
                    
                        
                    443rd
                        
                    
        
            Diamonds
            
                        
                    
                        
                    265th
                        
                    
        
            Divisors
            
                        
                    
                        
                    651st
                        
                    
        
            Emirp Numbers
            
                        
                    
                        
                    76th
                        
                    
        
            Emirp Numbers (Long)
            
                        
                    
                        
                    45th
                        
                    
        
            Emojify
            
                        
                    
                        
                    54th
                        
                    
        
            Evil Numbers
            
                        
                    
                        
                    1,071st
                        
                    
        
            Evil Numbers (Long)
            
                        
                    
                        
                    245th
                        
                    
        
            Factorial Factorisation
            
                        
                    
                        
                    561st
                        
                    
        
            Farey Sequence
            
                        
                    
                        
                    53rd
                        
                    
        
            Fibonacci
            
                        
                    
                        
                    
                        
                    8,915th
        
            Fizz Buzz
            
                        
                    
                        
                    25th
                        
                    
        
            Foo Fizz Buzz Bar
            
                        
                    
                        
                    254th
                        
                    
        
            Forsyth–Edwards Notation
            
                        
                    
                        
                    54th
                        
                    
        
            Fractions
            
                        
                    
                        
                    187th
                        
                    
        
            Game of Life
            
                        
                    
                        
                    260th
                        
                    
        
            Gijswijt’s Sequence
            
                        
                    
                        
                    254th
                        
                    
        
            Happy Numbers
            
                        
                    
                        
                    125th
                        
                    
        
            Happy Numbers (Long)
            
                        
                    
                        
                    94th
                        
                    
        
            Hexdump
            
                        
                    
                        
                    55th
                        
                    
        
            Hilbert Curve
            
                        
                    
                        
                    187th
                        
                    
        
            Intersection
            
                        
                    
                        
                    1,100th
                        
                    
        
            ISBN
            
                        
                    
                        
                    42nd
                        
                    
        
            Jacobi Symbol
            
                        
                    
                        
                    617th
                        
                    
        
            Kaprekar Numbers
            
                        
                    
                        
                    109th
                        
                    
        
            Kolakoski Constant
            
                        
                    
                        
                    49th
                        
                    
        
            Kolakoski Sequence
            
                        
                    
                        
                    399th
                        
                    
        
            Leap Years
            
                        
                    
                        
                    17th
                        
                    
        
            Levenshtein Distance
            
                        
                    
                        
                    238th
                        
                    
        
            Leyland Numbers
            
                        
                    
                        
                    136th
                        
                    
        
            Look and Say
            
                        
                    
                        
                    64th
                        
                    
        
            Lucky Numbers
            
                        
                    
                        
                    45th
                        
                    
        
            Lucky Tickets
            
                        
                    
                        
                    375th
                        
                    
        
            Mahjong
            
                        
                    
                        
                    25th
                        
                    
        
            Mandelbrot
            
                        
                    
                        
                    49th
                        
                    
        
            Maze
            
                        
                    
                        
                    33rd
                        
                    
        
            Medal Tally
            
                        
                    
                        
                    20th
                        
                    
        
            Minesweeper
            235th230th41st
                        
                    
        
            Morse Decoder
            
                        
                    
                        
                    22nd
                        
                    
        
            Morse Encoder
            
                        
                    
                        
                    11th
                        
                    
        
            Musical Chords
            
                        
                    
                        
                    21st
                        
                    
        
            N Queens
            
                        
                    
                        
                    25th
                        
                    
        
            Niven Numbers
            
                        
                    
                        
                    523rd
                        
                    
        
            Niven Numbers (Long)
            
                        
                    
                        
                    268th
                        
                    
        
            Number Spiral
            
                        
                    
                        
                    48th
                        
                    
        
            Odious Numbers
            
                        
                    
                        
                    915th
                        
                    
        
            Odious Numbers (Long)
            
                        
                    
                        
                    176th
                        
                    
        
            Ordinal Numbers
            
                        
                    
                        
                    147th
                        
                    
        
            Pangram Grep
            
                        
                    
                        
                    77th
                        
                    
        
            Partition Numbers
            
                        
                    
                        
                    30th
                        
                    
        
            Pascal’s Triangle
            
                        
                    
                        
                    595th
                        
                    
        
            Pernicious Numbers
            
                        
                    
                        
                    127th
                        
                    
        
            Pernicious Numbers (Long)
            
                        
                    
                        
                    66th
                        
                    
        
            Poker
            
                        
                    
                        
                    27th
                        
                    
        
            Polyominoes
            
                        
                    
                        
                    20th
                        
                    
        
            Prime Numbers
            
                        
                    
                        
                    301st
                        
                    
        
            Prime Numbers (Long)
            
                        
                    
                        
                    345th
                        
                    
        
            Proximity Grid
            
                        
                    
                        
                    35th
                        
                    
        
            QR Decoder
            
                        
                    
                        
                    19th
                        
                    
        
            Recamán
            
                        
                    
                        
                    31st
                        
                    
        
            Repeating Decimals
            
                        
                    
                        
                    362nd
                        
                    
        
            Reverse Polish Notation
            
                        
                    
                        
                    231st
                        
                    
        
            Reversi
            
                        
                    
                        
                    22nd
                        
                    
        
            Rijndael S-box
            
                        
                    
                        
                    16th
                        
                    
        
            Rock-paper-scissors-Spock-lizard
            
                        
                    
                        
                    27th
                        
                    
        
            Roman to Arabic
            
                        
                    
                        
                    121st
                        
                    
        
            ROT13
            
                        
                    
                        
                    452nd
                        
                    
        
            Rule 110
            
                        
                    
                        
                    170th
                        
                    
        
            Scrambled Sort
            
                        
                    
                        
                    188th
                        
                    
        
            Set
            
                        
                    
                        
                    104th
                        
                    
        
            Seven Segment
            
                        
                    
                        
                    21st
                        
                    
        
            SI Units
            
                        
                    
                        
                    9th
                        
                    
        
            Sierpiński Triangle
            
                        
                    
                        
                    28th
                        
                    
        
            Smith Numbers
            
                        
                    
                        
                    30th
                        
                    
        
            Spelling Numbers
            
                        
                    
                        
                    133rd
                        
                    
        
            Star Wars GPT
            
                        
                    
                        
                    60th
                        
                    
        
            Star Wars Opening Crawl
            
                        
                    
                        
                    17th
                        
                    
        
            Sudoku
            
                        
                    
                        
                    14th
                        
                    
        
            Sudoku (Fill-in)
            
                        
                    
                        
                    41st
                        
                    
        
            Ten-pin Bowling
            
                        
                    
                        
                    392nd
                        
                    
        
            Time Distance
            
                        
                    
                        
                    15th
                        
                    
        
            Tongue-twisters
            
                        
                    
                        
                    376th
                        
                    
        
            Topological Sort
            
                        
                    
                        
                    30th
                        
                    
        
            Transpose Sentence
            
                        
                    
                        
                    113th
                        
                    
        
            United States
            
                        
                    
                        
                    161st
                        
                    
        
            Vampire Numbers
            
                        
                    
                        
                    26th
                        
                    
        
            Zeckendorf Representation
            
                        
                    
                        
                    44th
                        
                    
        
            Zodiac Signs
            
                        
                    
                        
                    30th
                        
                    
        
            λ
            
                        
                    
                        
                    17th
                        
                    
        
            π
            
                        
                    
                        
                    334th
                        
                    
        
            τ
            
                        
                    
                        
                    308th
                        
                    
        
            φ
            
                        
                    
                        
                    180th
                        
                    
        
            𝑒
            
                        
                    
                        
                    349th