12 Days of Christmas
24th
99 Bottles of Beer
19th
Arrows
7th
Billiards
4th
Card Number Validation
6th
Christmas Trees
12th
Collatz
27th
CSS Colors
7th
Day of Week
8th
Divisors
25th
Emojify
7th
Factorial Factorisation
7th
Fibonacci
87th
Fizz Buzz
56th
Foo Fizz Buzz Bar
15th
Forsyth–Edwards Notation
6th
Happy Numbers
33rd
ISBN
8th
Leap Years
35th
ln 2
6th
Morse Decoder
5th
Morse Encoder
7th
Niven Numbers
34th
Ordinal Numbers
11th
Pangram Grep
13th
Pernicious Numbers
30th
Prime Numbers
35th
Prime Numbers (Long)
21st
Repeating Decimals
💎
Rock-paper-scissors-Spock-lizard
5th7th
ROT13
5th
Seven Segment
11th
Sudoku
3rd
Tic-tac-toe
5th
Tongue-twisters
12th
United States
10th
π
9th
τ
7th
√2
8th