12 Days of Christmas
14th
99 Bottles of Beer
8th
Abundant Numbers
13th
Christmas Trees
5th
Cubes
5th
Diamonds
8th
Divisors
26th
Emirp Numbers
8th
Emojify
3rd
Evil Numbers
18th
Fizz Buzz
18th
Happy Numbers
9th
Intersection
8th
Leap Years
21st
Leyland Numbers
5th
Look and Say
8th
Lucky Tickets
5th
Morse Decoder
3rd
Morse Encoder
3rd
Niven Numbers
28th
Odious Numbers
18th
Ordinal Numbers
6th
Pangram Grep
11th
Pascal’s Triangle
52nd
Pernicious Numbers
27th
Poker
3rd
Prime Numbers
15th
Recamán
10th
Rock-paper-scissors-Spock-lizard
4th
Roman to Arabic
25th
Rule 110
6th
Seven Segment
9th
Spelling Numbers
5th
Tongue-twisters
20th
United States
13th