12 Days of Christmas
            
                        
                    
                        
                    40th
                        
                    
                        
                    
        
            24 Game
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            99 Bottles of Beer
            
                        
                    
                        
                    53rd
                        
                    
                        
                    
        
            Abundant Numbers
            
                        
                    
                        
                    24th
                        
                    
                        
                    
        
            Abundant Numbers (Long)
            
                        
                    
                        
                    16th
                        
                    
                        
                    
        
            Arabic to Roman
            
                        
                    
                        
                    19th
                        
                    
                        
                    
        
            Arithmetic Numbers
            
                        
                    
                        
                    18th
                        
                    
                        
                    
        
            Arrows
            
                        
                    
                        
                    18th
                        
                    
                        
                    
        
            Ascending Primes
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            ASCII Table
            
                        
                    
                        
                    11th
                        
                    
                        
                    
        
            brainfuck
            
                        
                    
                        
                    11th
                        
                    
                        
                    
        
            Card Number Validation
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Catalan Numbers
            
                        
                    
                        
                    22nd
                        
                    
                        
                    
        
            Catalan’s Constant
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Christmas Trees
            
                        
                    
                        
                    26th
                        
                    
                        
                    
        
            Collatz
            
                        
                    
                        
                    14th
                        
                    
                        
                    
        
            CSS Colors
            
                        
                    
                        
                    25th
                        
                    
                        
                    
        
            Cubes
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Day of Week
            
                        
                    
                        
                    60th
                        
                    
                        
                    
        
            DFA Simulator
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Diamonds
            
                        
                    
                        
                    21st
                        
                    
                        
                    
        
            Divisors
            
                        
                    114th15th
                        
                    
                        
                    
        
            Emirp Numbers
            
                        
                    
                        
                    18th
                        
                    
                        
                    
        
            Emirp Numbers (Long)
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Emojify
            
                        
                    
                        
                    16th
                        
                    
                        
                    
        
            Evil Numbers
            
                        
                    
                        
                    2nd
                        
                    
                        
                    
        
            Evil Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
                        
                    
        
            Factorial Factorisation
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Farey Sequence
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Fibonacci
            
                        
                    
                        
                    58th
                        
                    
                        
                    
        
            Fizz Buzz
            
                        
                    
                        
                    36th
                        
                    
                        
                    
        
            Foo Fizz Buzz Bar
            
                        
                    
                        
                    25th
                        
                    
                        
                    
        
            Forsyth–Edwards Notation
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Fractions
            
                        
                    
                        
                    19th
                        
                    
                        
                    
        
            Game of Life
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Gijswijt’s Sequence
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Happy Numbers
            
                        
                    
                        
                    27th
                        
                    
                        
                    
        
            Happy Numbers (Long)
            
                        
                    
                        
                    15th
                        
                    
                        
                    
        
            Hexdump
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Hilbert Curve
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Intersection
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Inventory Sequence
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            ISBN
            
                        
                    
                        
                    24th
                        
                    
                        
                    
        
            Jacobi Symbol
            
                        
                    
                        
                    5th
                        
                    
                        
                    
        
            Kaprekar Numbers
            
                        
                    
                        
                    5th
                        
                    
                        
                    
        
            Kolakoski Constant
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Kolakoski Sequence
            
                        
                    
                        
                    19th
                        
                    
                        
                    
        
            Leap Years
            
                        
                    
                        
                    47th
                        
                    
                        
                    
        
            Levenshtein Distance
            20th
                        
                    5th19th11th
        
            Leyland Numbers
            
                        
                    
                        
                    21st
                        
                    
                        
                    
        
            ln 2
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Look and Say
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Lucky Numbers
            
                        
                    
                        
                    12th
                        
                    
                        
                    
        
            Lucky Tickets
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Mandelbrot
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Medal Tally
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Morse Decoder
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Morse Encoder
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            N Queens
            
                        
                    
                        
                    4th
                        
                    
                        
                    
        
            Niven Numbers
            
                        
                    
                        
                    27th
                        
                    
                        
                    
        
            Niven Numbers (Long)
            
                        
                    
                        
                    3rd
                        
                    
                        
                    
        
            Number Spiral
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Odious Numbers
            
                        
                    
                        
                    2nd
                        
                    
                        
                    
        
            Odious Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
                        
                    
        
            Ordinal Numbers
            
                        
                    
                        
                    26th
                        
                    
                        
                    
        
            PalindromemordnilaP
            
                        
                    
                        
                    4th
                        
                    
                        
                    
        
            Pangram Grep
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Partition Numbers
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Pascal’s Triangle
            
                        
                    
                        
                    25th
                        
                    
                        
                    
        
            Pernicious Numbers
            
                        
                    
                        
                    28th
                        
                    
                        
                    
        
            Pernicious Numbers (Long)
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Polyominoes
            
                        
                    
                        
                    4th
                        
                    
                        
                    
        
            Prime Numbers
            
                        
                    
                        
                    34th
                        
                    
                        
                    
        
            Prime Numbers (Long)
            
                        
                    
                        
                    29th
                        
                    
                        
                    
        
            QR Decoder
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Quine
            
                        
                    
                        
                    1st
                        
                    
                        
                    
        
            Recamán
            
                        
                    
                        
                    14th
                        
                    
                        
                    
        
            Repeating Decimals
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Reverse Polish Notation
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Reversi
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Rijndael S-box
            
                        
                    
                        
                    5th
                        
                    
                        
                    
        
            Rock-paper-scissors-Spock-lizard
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Roman to Arabic
            
                        
                    
                        
                    15th
                        
                    
                        
                    
        
            ROT13
            
                        
                    
                        
                    2nd
                        
                    
                        
                    
        
            Rule 110
            
                        
                    
                        
                    14th
                        
                    
                        
                    
        
            Scrambled Sort
            
                        
                    
                        
                    4th
                        
                    
                        
                    
        
            Set
            
                        
                    
                        
                    3rd
                        
                    
                        
                    
        
            Seven Segment
            
                        
                    
                        
                    15th
                        
                    
                        
                    
        
            SI Units
            
                        
                    
                        
                    5th
                        
                    
                        
                    
        
            Sierpiński Triangle
            
                        
                    
                        
                    13th
                        
                    
                        
                    
        
            Smith Numbers
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Spelling Numbers
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Star Wars GPT
            
                        
                    
                        
                    3rd
                        
                    
                        
                    
        
            Sudoku
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Sudoku (Fill-in)
            
                        
                    
                        
                    5th
                        
                    
                        
                    
        
            Ten-pin Bowling
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            Tic-tac-toe
            
                        
                    
                        
                    8th
                        
                    
                        
                    
        
            Time Distance
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            Tongue-twisters
            
                        
                    
                        
                    13th
                        
                    
                        
                    
        
            Transpose Sentence
            
                        
                    
                        
                    9th
                        
                    
                        
                    
        
            United States
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            Vampire Numbers
            
                        
                    
                        
                    12th
                        
                    
                        
                    
        
            Van Eck Sequence
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Zeckendorf Representation
            
                        
                    
                        
                    10th
                        
                    
                        
                    
        
            Zodiac Signs
            
                        
                    
                        
                    7th
                        
                    
                        
                    
        
            γ
            
                        
                    
                        
                    4th
                        
                    
                        
                    
        
            λ
            
                        
                    
                        
                    6th
                        
                    
                        
                    
        
            π
            
                        
                    
                        
                    18th
                        
                    
                        
                    
        
            τ
            
                        
                    
                        
                    13th
                        
                    
                        
                    
        
            φ
            
                        
                    
                        
                    15th
                        
                    
                        
                    
        
            √2
            
                        
                    
                        
                    14th
                        
                    
                        
                    
        
            𝑒
            
                        
                    
                        
                    16th