12 Days of Christmas
15th
99 Bottles of Beer
8th
Abundant Numbers
11th
Christmas Trees
5th
Cubes
5th
Diamonds
8th
Divisors
25th
Emirp Numbers
8th
Emojify
3rd
Evil Numbers
15th
Fizz Buzz
16th
Happy Numbers
9th
Intersection
7th
Leap Years
19th
Leyland Numbers
5th
Look and Say
7th
Lucky Tickets
5th
Morse Decoder
3rd
Morse Encoder
3rd
Niven Numbers
26th
Odious Numbers
15th
Ordinal Numbers
6th
Pangram Grep
11th
Pascal’s Triangle
49th
Pernicious Numbers
24th
Poker
2nd
Prime Numbers
14th
Recamán
8th
Rock-paper-scissors-Spock-lizard
5th
Roman to Arabic
20th
Rule 110
5th
Seven Segment
8th
Spelling Numbers
5th
Tongue-twisters
19th
United States
10th