Abundant Numbers
43rd
Divisors
53rd
Emirp Numbers
42nd
Evil Numbers
66th
Fibonacci
175th
Fizz Buzz
237th
Happy Numbers
84th
Leap Years
67th
Lucky Tickets
12th
Morse Decoder
12th
Morse Encoder
14th
Niven Numbers
53rd
Odious Numbers
63rd
Ordinal Numbers
26th
Pangram Grep
35th
Pascal’s Triangle
36th
Pernicious Numbers
53rd
Poker
11th
Prime Numbers
82nd
Rock-paper-scissors-Spock-lizard
17th
Rule 110
16th
Seven Segment
21st
Sierpiński Triangle
33rd
Spelling Numbers
12th
Sudoku
10th
π
22nd
τ
17th
φ
26th
√2
30th
𝑒
21st