12 Days of Christmas
            4th
                        
                    147th
                        
                    
        
            99 Bottles of Beer
            2nd
                        
                    120th
                        
                    
        
            Abundant Numbers
            1st
                        
                    12th
                        
                    
        
            Abundant Numbers (Long)
            1st
                        
                    69th
                        
                    
        
            Arabic to Roman
            
                        
                    
                        
                    68th
                        
                    
        
            Arithmetic Numbers
            4th
                        
                    
                        
                    
                        
                    
        
            Ascending Primes
            
                        
                    
                        
                    15th
                        
                    
        
            ASCII Table
            1st
                        
                    51st
                        
                    
        
            Billiards
            
                        
                    
                        
                    22nd
                        
                    
        
            Card Number Validation
            
                        
                    
                        
                    27th
                        
                    
        
            Catalan Numbers
            1st
                        
                    1st
                        
                    
        
            Catalan’s Constant
            1st
                        
                    23rd
                        
                    
        
            Christmas Trees
            1st
                        
                    77th
                        
                    
        
            Collatz
            2nd
                        
                    103rd
                        
                    
        
            Cubes
            💎
                        
                    68th
                        
                    
        
            Diamonds
            4th
                        
                    20th
                        
                    
        
            Divisors
            1st
                        
                    115th
                        
                    
        
            Emirp Numbers
            9th
                        
                    12th
                        
                    
        
            Emirp Numbers (Long)
            8th
                        
                    42nd
                        
                    
        
            Evil Numbers
            6th
                        
                    1st8th
        
            Evil Numbers (Long)
            1st
                        
                    1st4th
        
            Factorial Factorisation
            💎
                        
                    28th
                        
                    
        
            Farey Sequence
            
                        
                    
                        
                    33rd
                        
                    
        
            Fibonacci
            1st
                        
                    1st
                        
                    
        
            Fizz Buzz
            
                        
                    
                        
                    192nd291st
        
            Foo Fizz Buzz Bar
            1st
                        
                    126th
                        
                    
        
            Fractions
            1st
                        
                    56th
                        
                    
        
            Game of Life
            
                        
                    
                        
                    42nd
                        
                    
        
            Gijswijt’s Sequence
            
                        
                    
                        
                    33rd
                        
                    
        
            Happy Numbers
            11th
                        
                    47th
                        
                    
        
            Happy Numbers (Long)
            1st
                        
                    61st
                        
                    
        
            Hexdump
            
                        
                    
                        
                    50th
                        
                    
        
            Intersection
            1st
                        
                    90th
                        
                    
        
            Inventory Sequence
            2nd
                        
                    22nd
                        
                    
        
            ISBN
            7th
                        
                    74th
                        
                    
        
            Jacobi Symbol
            4th
                        
                    
                        
                    
                        
                    
        
            Kolakoski Constant
            💎
                        
                    31st
                        
                    
        
            Kolakoski Sequence
            1st
                        
                    3rd
                        
                    
        
            Leap Years
            1st
                        
                    1st
                        
                    
        
            Levenshtein Distance
            3rd
                        
                    
                        
                    
                        
                    
        
            Leyland Numbers
            4th
                        
                    86th
                        
                    
        
            Look and Say
            1st
                        
                    49th
                        
                    
        
            Lucky Numbers
            7th
                        
                    28th
                        
                    
        
            Lucky Tickets
            1st
                        
                    35th
                        
                    
        
            Niven Numbers
            1st
                        
                    1st
                        
                    
        
            Niven Numbers (Long)
            
                        
                    
                        
                    1st
                        
                    
        
            Number Spiral
            5th
                        
                    29th
                        
                    
        
            Odious Numbers
            6th
                        
                    1st1st
        
            Odious Numbers (Long)
            1st
                        
                    1st
                        
                    
        
            Ordinal Numbers
            1st
                        
                    81st3rd
        
            PalindromemordnilaP
            1st3rd40th
                        
                    
        
            Pangram Grep
            1st
                        
                    88th
                        
                    
        
            Pascal’s Triangle
            3rd
                        
                    41st
                        
                    
        
            Pernicious Numbers
            5th
                        
                    1st
                        
                    
        
            Pernicious Numbers (Long)
            1st
                        
                    26th
                        
                    
        
            Prime Numbers
            1st
                        
                    1st12th
        
            Prime Numbers (Long)
            1st
                        
                    1st
                        
                    
        
            Quine
            1st
                        
                    1st
                        
                    
        
            Recamán
            1st
                        
                    54th
                        
                    
        
            Repeating Decimals
            
                        
                    
                        
                    20th
                        
                    
        
            Reverse Polish Notation
            1st
                        
                    64th
                        
                    
        
            Rijndael S-box
            
                        
                    
                        
                    27th
                        
                    
        
            Roman to Arabic
            1st
                        
                    58th
                        
                    
        
            ROT13
            1st
                        
                    51st
                        
                    
        
            Rule 110
            3rd
                        
                    24th
                        
                    
        
            Seven Segment
            
                        
                    
                        
                    66th
                        
                    
        
            Sierpiński Triangle
            1st
                        
                    17th
                        
                    
        
            Smith Numbers
            
                        
                    
                        
                    54th
                        
                    
        
            Spelling Numbers
            6th
                        
                    47th
                        
                    
        
            Tic-tac-toe
            1st
                        
                    24th
                        
                    
        
            Tongue-twisters
            
                        
                    
                        
                    92nd
                        
                    
        
            Transpose Sentence
            
                        
                    
                        
                    47th
                        
                    
        
            United States
            
                        
                    
                        
                    
                        
                    
                        
                    
        
            Vampire Numbers
            3rd
                        
                    56th
                        
                    
        
            Van Eck Sequence
            5th
                        
                    41st
                        
                    
        
            Zeckendorf Representation
            
                        
                    
                        
                    42nd
                        
                    
        
            π
            5th
                        
                    47th
                        
                    
        
            τ
            4th
                        
                    47th
                        
                    
        
            φ
            1st
                        
                    32nd
                        
                    
        
            √2
            1st
                        
                    1st
                        
                    
        
            𝑒
            2nd
                        
                    1st