Abundant Numbers
48th
Divisors
58th
Emirp Numbers
47th
Evil Numbers
70th
Fibonacci
192nd
Fizz Buzz
251st
Happy Numbers
99th
Leap Years
75th
Lucky Tickets
13th
Morse Decoder
13th
Morse Encoder
14th
Niven Numbers
62nd
Odious Numbers
69th
Ordinal Numbers
28th
Pangram Grep
39th
Pascal’s Triangle
40th
Pernicious Numbers
58th
Poker
13th
Prime Numbers
85th
Rock-paper-scissors-Spock-lizard
17th
Rule 110
18th
Seven Segment
24th
Sierpiński Triangle
35th
Spelling Numbers
13th
Sudoku
10th
π
25th
τ
18th
φ
30th
√2
32nd
𝑒
22nd