12 Days of Christmas
24th
99 Bottles of Beer
19th
Arrows
10th
Billiards
5th
Card Number Validation
9th
Christmas Trees
14th
Collatz
29th
CSS Colors
8th
Day of Week
9th
Divisors
25th
Emojify
8th
Factorial Factorisation
8th
Fibonacci
92nd
Fizz Buzz
56th
Foo Fizz Buzz Bar
17th
Forsyth–Edwards Notation
7th
Happy Numbers
36th
ISBN
9th
Leap Years
36th
ln 2
7th
Morse Decoder
6th
Morse Encoder
8th
Niven Numbers
36th
Ordinal Numbers
12th
Pangram Grep
14th
Pernicious Numbers
33rd
Prime Numbers
36th
Prime Numbers (Long)
22nd
Repeating Decimals
2nd
Rock-paper-scissors-Spock-lizard
5th8th
ROT13
6th
Seven Segment
12th
Sudoku
4th
Tic-tac-toe
6th
Tongue-twisters
13th
Trinomial Triangle
7th
United States
11th
π
11th
τ
8th
√2
9th