12 Days of Christmas

7^{th}

24 Game

5^{th}

99 Bottles of Beer

11^{th}

Abundant Numbers

12^{th}

Abundant Numbers (Long)

11^{th}

Arabic to Roman

10^{th}

Arithmetic Numbers

7^{th}

Arrows

11^{th}

Ascending Primes

5^{th}

ASCII Table

7^{th}

brainfuck

10^{th}

Catalan Numbers

10^{th}

Catalan’s Constant

1^{st}

Christmas Trees

7^{th}

Collatz

12^{th}

CSS Colors

8^{th}

Cubes

9^{th}

Day of Week

6^{th}

Diamonds

8^{th}

Divisors

12^{th}

Emirp Numbers

11^{th}

Emirp Numbers (Long)

8^{th}

Emojify

9^{th}

Evil Numbers

13^{th}

Evil Numbers (Long)

5^{th}

Factorial Factorisation

6^{th}

Farey Sequence

6^{th}

Fibonacci

1^{st}

Fizz Buzz

5^{th}160

^{th}

Foo Fizz Buzz Bar

10^{th}

Fractions

9^{th}

Happy Numbers

5^{th}

Happy Numbers (Long)

4^{th}

Intersection

8^{th}

Inventory Sequence

6^{th}

ISBN

11^{th}

Kolakoski Constant

10^{th}

Kolakoski Sequence

8^{th}

Leap Years

18^{th}

Levenshtein Distance

7^{th}

Leyland Numbers

9^{th}

ln 2

1^{st}

Look and Say

11^{th}

Lucky Numbers

4^{th}

Lucky Tickets

8^{th}

Morse Decoder

8^{th}

Morse Encoder

9^{th}

N Queens

9^{th}

Niven Numbers

16^{th}

Niven Numbers (Long)

1^{st}

Number Spiral

5^{th}

Odious Numbers

13^{th}

Odious Numbers (Long)

11^{th}

Ordinal Numbers

8^{th}

Pangram Grep

12^{th}

Pascal’s Triangle

9^{th}

Pernicious Numbers

18^{th}

Polyominoes

3^{rd}

Prime Numbers

10^{th}

Prime Numbers (Long)

11^{th}

Quine

1^{st}

Recamán

4^{th}

Reverse Polish Notation

6^{th}

Rock-paper-scissors-Spock-lizard

11^{th}

Roman to Arabic

8^{th}

Rule 110

11^{th}

Seven Segment

10^{th}

Sierpiński Triangle

14^{th}

Smith Numbers

4^{th}

Spelling Numbers

5^{th}

Star Wars Opening Crawl

6^{th}

Sudoku

7^{th}

Ten-pin Bowling

10^{th}

Tongue-twisters

8^{th}

Transpose Sentence

5^{th}22

^{nd}

United States

6^{th}

Vampire Numbers

7^{th}

Van Eck Sequence

8^{th}

Zeckendorf Representation

7^{th}

γ

1^{st}

λ

8^{th}

π

1^{st}

τ

1^{st}

φ

1^{st}

√2

1^{st}

𝑒

1^{st}