### 12 Days of Christmas

49^{th}

### 99 Bottles of Beer

85^{th}

### Abundant Numbers

98^{th}

### Arabic to Roman

50^{th}

### brainfuck

47^{th}

### Christmas Trees

75^{th}

### CSS Colors

2^{nd}21

^{st}2

^{nd}

### Cubes

1^{st}17

^{th}

### Diamonds

68^{th}

### Divisors

263^{rd}

### Emirp Numbers

148^{th}

### Emojify

2^{nd}17

^{th}2

^{nd}

### Evil Numbers

9^{th}41

^{st}5

^{th}

### Fibonacci

43^{rd}32

^{nd}40

^{th}17

^{th}

### Fizz Buzz

30^{th}13

^{th}41

^{st}10

^{th}

### Happy Numbers

57^{th}

### Intersection

2^{nd}34

^{th}

### Kolakoski Constant

### Kolakoski Sequence

### Leap Years

10^{th}27

^{th}4

^{th}

### Levenshtein Distance

3^{rd}19

^{th}2

^{nd}

### Leyland Numbers

41^{st}

### Look and Say

29^{th}

### Lucky Tickets

3^{rd}12

^{th}4

^{th}

### Morse Decoder

### Morse Encoder

31^{st}

### Niven Numbers

9^{th}61

^{st}6

^{th}

### Odious Numbers

9^{th}28

^{th}5

^{th}

### Ordinal Numbers

10^{th}68

^{th}9

^{th}

### Pangram Grep

48^{th}

### Pascalβs Triangle

102^{nd}

### Pernicious Numbers

13^{th}87

^{th}15

^{th}

### Poker

### Prime Numbers

41^{st}

### Quine

11^{th}15

^{th}

### RecamΓ‘n

4^{th}14

^{th}2

^{nd}

### Rock-paper-scissors-Spock-lizard

51^{st}

### Roman to Arabic

72^{nd}

### Rule 110

8^{th}

### Seven Segment

85^{th}

### SierpiΕski Triangle

22^{nd}

### Spelling Numbers

26^{th}

### Sudoku

### Ten-pin Bowling

### Tongue-twisters

41^{st}

### United States

6^{th}17

^{th}2

^{nd}

### Vampire Numbers

2^{nd}31

^{st}4

^{th}

### Ξ»

3^{rd}7

^{th}2

^{nd}

### Ο

4^{th}14

^{th}

### Ο

4^{th}12

^{th}

### Ο

4^{th}22

^{nd}2

^{nd}

### β2

1^{st}26

^{th}

### π

5^{th}30

^{th}3

^{rd}