12 Days of Christmas
21st
99 Bottles of Beer
277th
41st
Abundant Numbers
31st
Christmas Trees
3rd
CSS Colors
17th
Cubes
28th
Diamonds
46th
Divisors
398th
1st
35th
Emirp Numbers
25th
36th
88th
60th
31st
32nd
193rd
32nd
12th
36th
17th
37th
43rd
523rd
68th
Emojify
16th
Evil Numbers
665th
19th
Fibonacci
105th
84th
Fizz Buzz
8th
1,489th
1st
Happy Numbers
418th
62nd
Leap Years
25th
Leyland Numbers
42nd
Morse Decoder
14th
Morse Encoder
15th
Niven Numbers
34th
Odious Numbers
17th
Ordinal Numbers
44th
Pangram Grep
31st
Pascalβs Triangle
25th
Pernicious Numbers
48th
Poker
14th
Prime Numbers
20th
Quine
1st
533rd
84th
Rock-paper-scissors-Spock-lizard
32nd
Roman to Arabic
42nd
Rule 110
41st
Seven Segment
25th
SierpiΕski Triangle
23rd
Spelling Numbers
19th
Ten-pin Bowling
12th
Tongue-twisters
31st
Ξ»
25th
Ο
23rd
Ο
16th
Ο
42nd
β2
31st
π
43rd