Abundant Numbers
            51st
        
            Abundant Numbers (Long)
            28th
        
            Arithmetic Numbers
            23rd
        
            Collatz
            106th
        
            CSS Colors
            140th
        
            Divisors
            1st
        
            Emirp Numbers
            100th
        
            Evil Numbers
            1st
        
            Evil Numbers (Long)
            35th
        
            Factorial Factorisation
            43rd
        
            Fibonacci
            1st
        
            Fizz Buzz
            54th
        
            Happy Numbers
            55th
        
            Kolakoski Sequence
            71st
        
            Leap Years
            14th
        
            ln 2
            1st
        
            Look and Say
            89th
        
            Lucky Numbers
            59th
        
            Niven Numbers
            36th
        
            Niven Numbers (Long)
            89th
        
            Odious Numbers
            1st
        
            Odious Numbers (Long)
            77th
        
            Ordinal Numbers
            68th
        
            Pangram Grep
            36th
        
            Pascal’s Triangle
            74th
        
            Pernicious Numbers
            72nd
        
            Prime Numbers
            74th
        
            Quine
            1st
        
            Recamán
            69th
        
            Rock-paper-scissors-Spock-lizard
            71st
        
            Roman to Arabic
            100th
        
            ROT13
            82nd
        
            Sierpiński Triangle
            36th
        
            Tic-tac-toe
            60th
        
            π
            94th
        
            τ
            90th
        
            √2
            1st
        
            𝑒
            1st