12 Days of Christmas
561st
Abundant Numbers
210th
Arabic to Roman
244th
Christmas Trees
222nd
Cubes
257th
Diamonds
158th
Divisors
1st
Emirp Numbers
285th
Evil Numbers
57th1st
Fibonacci
185th164th
Fizz Buzz
59th
Happy Numbers
218th
Leap Years
222nd
Morse Decoder
72nd
Morse Encoder
86th
Niven Numbers
60th44th
Odious Numbers
56th1st
Ordinal Numbers
5th
Pangram Grep
413th
Pascal’s Triangle
79th
Pernicious Numbers
405th
Prime Numbers
258th
Quine
75th
Rock-paper-scissors-Spock-lizard
129th
Roman to Arabic
285th
Rule 110
245th
Seven Segment
92nd
Sierpiński Triangle
76th
Spelling Numbers
194th
United States
133rd
φ
176th
√2
229th