12 Days of Christmas
            21st
        
            99 Bottles of Beer
            26th
        
            Abundant Numbers
            46th
        
            ASCII Table
            37th
        
            Cubes
            16th
        
            Divisors
            15th
        
            Emirp Numbers
            41st
        
            Emojify
            17th
        
            Evil Numbers
            70th
        
            Fibonacci
            97th
        
            Fizz Buzz
            302nd
        
            Fractions
            18th
        
            Intersection
            13th
        
            Leap Years
            21st
        
            Levenshtein Distance
            12th
        
            Niven Numbers
            34th
        
            Odious Numbers
            60th
        
            Pangram Grep
            5th
        
            Pascal’s Triangle
            75th
        
            Pernicious Numbers
            57th
        
            Prime Numbers
            19th
        
            Quine
            30th
        
            Recamán
            22nd
        
            Rule 110
            22nd
        
            Seven Segment
            14th
        
            Spelling Numbers
            7th
        
            Tongue-twisters
            24th
        
            United States
            24th