12 Days of Christmas
525th
Abundant Numbers
198th
Arabic to Roman
232nd
Christmas Trees
199th
Cubes
252nd
Diamonds
149th
Divisors
1st
Emirp Numbers
274th
Evil Numbers
48th1st
Fibonacci
164th149th
Fizz Buzz
54th
Happy Numbers
204th
Leap Years
209th
Morse Decoder
64th
Morse Encoder
75th
Niven Numbers
51st36th
Odious Numbers
45th1st
Ordinal Numbers
4th
Pangram Grep
387th
Pascal’s Triangle
70th
Pernicious Numbers
382nd
Prime Numbers
240th
Quine
67th
Rock-paper-scissors-Spock-lizard
124th
Roman to Arabic
271st
Rule 110
232nd
Seven Segment
84th
Sierpiński Triangle
68th
Spelling Numbers
183rd
United States
125th
φ
168th
√2
211th