12 Days of Christmas
43rd
99 Bottles of Beer
42nd
Abundant Numbers
51st
Christmas Trees
46th
Collatz
45th
Divisors
70th
Emirp Numbers
37th
Emojify
28th
Evil Numbers
52nd
Evil Numbers (Long)
41st
Fibonacci
147th
Fizz Buzz
216th
Foo Fizz Buzz Bar
58th
Happy Numbers
32nd
Leap Years
97th
Look and Say
26th
Niven Numbers
53rd
Niven Numbers (Long)
28th
Odious Numbers
46th
Ordinal Numbers
31st
Pangram Grep
45th
Pernicious Numbers
44th
Prime Numbers
68th
Recamán
24th
Seven Segment
17th
Spelling Numbers
12th
Time Distance
8th
Tongue-twisters
47th
United States
25th