12 Days of Christmas
6th
Abundant Numbers
11th
Abundant Numbers (Long)
11th
Arabic to Roman
4th
Arrows
5th
ASCII Table
9th
Catalan Numbers
15th
Divisors
14th
Emirp Numbers
21st
Evil Numbers
29th
Fizz Buzz
30th
Fractions
5th
ISBN
7th
Look and Say
8th
Number Spiral
20th
Rock-paper-scissors-Spock-lizard
5th