Abundant Numbers
42nd
Divisors
52nd
Emirp Numbers
40th
Evil Numbers
65th
Fibonacci
176th
Fizz Buzz
235th
Happy Numbers
82nd
Leap Years
67th
Lucky Tickets
12th
Morse Decoder
12th
Morse Encoder
14th
Niven Numbers
52nd
Odious Numbers
62nd
Ordinal Numbers
26th
Pangram Grep
35th
Pascal’s Triangle
34th
Pernicious Numbers
52nd
Poker
11th
Prime Numbers
81st
Rock-paper-scissors-Spock-lizard
17th
Rule 110
16th
Seven Segment
21st
Sierpiński Triangle
33rd
Spelling Numbers
13th
Sudoku
10th
π
23rd
τ
19th
φ
24th
√2
29th
𝑒
21st