12 Days of Christmas
42nd
99 Bottles of Beer
41st
Abundant Numbers
50th
Christmas Trees
46th
Collatz
43rd
Divisors
68th
Emirp Numbers
37th
Emojify
27th
Evil Numbers
51st
Evil Numbers (Long)
40th
Fibonacci
143rd
Fizz Buzz
216th
Foo Fizz Buzz Bar
57th
Happy Numbers
32nd
Leap Years
96th
Look and Say
25th
Niven Numbers
52nd
Niven Numbers (Long)
27th
Odious Numbers
45th
Ordinal Numbers
31st
Pangram Grep
45th
Pernicious Numbers
44th
Prime Numbers
67th
Recamán
24th
Seven Segment
17th
Spelling Numbers
11th
Time Distance
8th
Tongue-twisters
47th
United States
25th