12 Days of Christmas
24th
Abundant Numbers
32nd
Christmas Trees
25th
Divisors
28th
Emirp Numbers
13th
Evil Numbers
36th
Fibonacci
74th
Fizz Buzz
2,333rd131st
Happy Numbers
32nd
Leap Years
42nd
Morse Decoder
7th
Morse Encoder
8th
Niven Numbers
40th
Odious Numbers
36th
Ordinal Numbers
15th
Pangram Grep
31st
Pascal’s Triangle
19th
Pernicious Numbers
35th
Prime Numbers
20th
Seven Segment
9th
Spelling Numbers
7th