12 Days of Christmas
570th
Abundant Numbers
256th
Arabic to Roman
256th
Christmas Trees
248th
Cubes
242nd
Diamonds
175th
Divisors
118th
Emirp Numbers
83rd
Evil Numbers
56th1st
Fibonacci
177th162nd
Fizz Buzz
209th
Happy Numbers
241st
Leap Years
116th
Morse Decoder
87th
Morse Encoder
98th
Niven Numbers
58th39th
Odious Numbers
55th1st
Ordinal Numbers
87th
Pangram Grep
413th
Pascal’s Triangle
103rd
Pernicious Numbers
268th
Prime Numbers
249th
Quine
72nd
Rock-paper-scissors-Spock-lizard
144th
Roman to Arabic
288th
Rule 110
235th
Seven Segment
124th
Sierpiński Triangle
93rd
Spelling Numbers
194th
United States
157th
φ
201st
√2
251st