12 Days of Christmas
26th
Abundant Numbers
34th
Christmas Trees
27th
Divisors
29th
Emirp Numbers
13th
Evil Numbers
37th
Fibonacci
79th
Fizz Buzz
2,397th135th
Happy Numbers
34th
Leap Years
43rd
Morse Decoder
9th
Morse Encoder
10th
Niven Numbers
42nd
Odious Numbers
38th
Ordinal Numbers
17th
Pangram Grep
33rd
Pascal’s Triangle
19th
Pernicious Numbers
39th
Prime Numbers
21st
Seven Segment
11th
Spelling Numbers
7th