12 Days of Christmas
            
                        
                    
                        
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            24 Game
            
                        
                    
                        
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            99 Bottles of Beer
            
                        
                    
                        
                    1st
                        
                    
        
            Abundant Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Arabic to Roman
            
                        
                    
                        
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            Arithmetic Numbers
            
                        
                    
                        
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            Arrows
            
                        
                    
                        
                    1st
                        
                    
        
            Ascending Primes
            
                        
                    
                        
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            ASCII Table
            
                        
                    
                        
                    2nd
                        
                    
        
            Billiards
            
                        
                    
                        
                    3rd
                        
                    
        
            brainfuck
            
                        
                    
                        
                    💎
                        
                    
        
            Card Number Validation
            
                        
                    
                        
                    1st
                        
                    
        
            Catalan Numbers
            
                        
                    
                        
                    4th
                        
                    
        
            Catalan’s Constant
            
                        
                    
                        
                    5th
                        
                    
        
            Christmas Trees
            
                        
                    
                        
                    1st
                        
                    
        
            Collatz
            
                        
                    
                        
                    1st
                        
                    
        
            CSS Colors
            
                        
                    
                        
                    1st
                        
                    
        
            Cubes
            
                        
                    
                        
                    💎
                        
                    
        
            Day of Week
            
                        
                    
                        
                    1st
                        
                    
        
            DFA Simulator
            
                        
                    
                        
                    6th
                        
                    
        
            Diamonds
            
                        
                    
                        
                    3rd
                        
                    
        
            Divisors
            
                        
                    
                        
                    2nd
                        
                    
        
            Emirp Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Emirp Numbers (Long)
            
                        
                    
                        
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            Emojify
            
                        
                    
                        
                    2nd
                        
                    
        
            Evil Numbers
            
                        
                    
                        
                    2nd
                        
                    
        
            Evil Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Factorial Factorisation
            
                        
                    
                        
                    7th
                        
                    
        
            Farey Sequence
            
                        
                    
                        
                    1st
                        
                    
        
            Fibonacci
            
                        
                    
                        
                    
                        
                    45th
        
            Fizz Buzz
            
                        
                    
                        
                    1st
                        
                    
        
            Foo Fizz Buzz Bar
            
                        
                    
                        
                    1st
                        
                    
        
            Forsyth–Edwards Notation
            
                        
                    
                        
                    2nd
                        
                    
        
            Fractions
            
                        
                    
                        
                    1st
                        
                    
        
            Game of Life
            
                        
                    
                        
                    2nd
                        
                    
        
            Gijswijt’s Sequence
            
                        
                    
                        
                    4th
                        
                    
        
            Happy Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Happy Numbers (Long)
            
                        
                    
                        
                    💎
                        
                    
        
            Hexdump
            
                        
                    
                        
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            Hilbert Curve
            
                        
                    
                        
                    2nd
                        
                    
        
            Intersection
            
                        
                    
                        
                    11th
                        
                    
        
            ISBN
            
                        
                    
                        
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            Jacobi Symbol
            
                        
                    
                        
                    6th
                        
                    
        
            Kaprekar Numbers
            
                        
                    
                        
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            Kolakoski Constant
            
                        
                    
                        
                    3rd
                        
                    
        
            Kolakoski Sequence
            
                        
                    
                        
                    2nd
                        
                    
        
            Leap Years
            
                        
                    
                        
                    1st
                        
                    
        
            Levenshtein Distance
            
                        
                    
                        
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            Leyland Numbers
            
                        
                    
                        
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            Look and Say
            
                        
                    
                        
                    1st
                        
                    
        
            Lucky Numbers
            
                        
                    
                        
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            Lucky Tickets
            
                        
                    
                        
                    6th
                        
                    
        
            Mahjong
            
                        
                    
                        
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            Mandelbrot
            
                        
                    
                        
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            Maze
            
                        
                    
                        
                    1st
                        
                    
        
            Medal Tally
            
                        
                    
                        
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            Minesweeper
            9th4th🦄
                        
                    
        
            Morse Decoder
            
                        
                    
                        
                    💎
                        
                    
        
            Morse Encoder
            
                        
                    
                        
                    💎
                        
                    
        
            Musical Chords
            
                        
                    
                        
                    💎
                        
                    
        
            N Queens
            
                        
                    
                        
                    💎
                        
                    
        
            Niven Numbers
            
                        
                    
                        
                    8th
                        
                    
        
            Niven Numbers (Long)
            
                        
                    
                        
                    3rd
                        
                    
        
            Number Spiral
            
                        
                    
                        
                    💎
                        
                    
        
            Odious Numbers
            
                        
                    
                        
                    2nd
                        
                    
        
            Odious Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Ordinal Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Pangram Grep
            
                        
                    
                        
                    1st
                        
                    
        
            Partition Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Pascal’s Triangle
            
                        
                    
                        
                    5th
                        
                    
        
            Pernicious Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Pernicious Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Poker
            
                        
                    
                        
                    💎
                        
                    
        
            Polyominoes
            
                        
                    
                        
                    💎
                        
                    
        
            Prime Numbers
            
                        
                    
                        
                    1st
                        
                    
        
            Prime Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Proximity Grid
            
                        
                    
                        
                    💎
                        
                    
        
            QR Decoder
            
                        
                    
                        
                    💎
                        
                    
        
            Recamán
            
                        
                    
                        
                    1st
                        
                    
        
            Repeating Decimals
            
                        
                    
                        
                    5th
                        
                    
        
            Reverse Polish Notation
            
                        
                    
                        
                    2nd
                        
                    
        
            Reversi
            
                        
                    
                        
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            Rijndael S-box
            
                        
                    
                        
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            Rock-paper-scissors-Spock-lizard
            
                        
                    
                        
                    💎
                        
                    
        
            Roman to Arabic
            
                        
                    
                        
                    💎
                        
                    
        
            ROT13
            
                        
                    
                        
                    4th
                        
                    
        
            Rule 110
            
                        
                    
                        
                    2nd
                        
                    
        
            Scrambled Sort
            
                        
                    
                        
                    2nd
                        
                    
        
            Set
            
                        
                    
                        
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            Seven Segment
            
                        
                    
                        
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            SI Units
            
                        
                    
                        
                    💎
                        
                    
        
            Sierpiński Triangle
            
                        
                    
                        
                    💎
                        
                    
        
            Smith Numbers
            
                        
                    
                        
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            Spelling Numbers
            
                        
                    
                        
                    💎
                        
                    
        
            Star Wars GPT
            
                        
                    
                        
                    💎
                        
                    
        
            Star Wars Opening Crawl
            
                        
                    
                        
                    💎
                        
                    
        
            Sudoku
            
                        
                    
                        
                    💎
                        
                    
        
            Sudoku (Fill-in)
            
                        
                    
                        
                    💎
                        
                    
        
            Ten-pin Bowling
            
                        
                    
                        
                    6th
                        
                    
        
            Time Distance
            
                        
                    
                        
                    💎
                        
                    
        
            Tongue-twisters
            
                        
                    
                        
                    8th
                        
                    
        
            Topological Sort
            
                        
                    
                        
                    💎
                        
                    
        
            Transpose Sentence
            
                        
                    
                        
                    1st
                        
                    
        
            United States
            
                        
                    
                        
                    3rd
                        
                    
        
            Vampire Numbers
            
                        
                    
                        
                    💎
                        
                    
        
            Zeckendorf Representation
            
                        
                    
                        
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            Zodiac Signs
            
                        
                    
                        
                    💎
                        
                    
        
            λ
            
                        
                    
                        
                    💎
                        
                    
        
            π
            
                        
                    
                        
                    4th
                        
                    
        
            τ
            
                        
                    
                        
                    2nd
                        
                    
        
            φ
            
                        
                    
                        
                    1st
                        
                    
        
            𝑒
            
                        
                    
                        
                    3rd