12 Days of Christmas
24th
Abundant Numbers
32nd
Christmas Trees
24th
Divisors
28th
Emirp Numbers
13th
Evil Numbers
33rd
Fibonacci
72nd
Fizz Buzz
2,299th130th
Happy Numbers
29th
Leap Years
41st
Morse Decoder
7th
Morse Encoder
8th
Niven Numbers
37th
Odious Numbers
33rd
Ordinal Numbers
15th
Pangram Grep
28th
Pascal’s Triangle
18th
Pernicious Numbers
34th
Prime Numbers
19th
Seven Segment
9th
Spelling Numbers
7th