### 12 Days of Christmas

9^{th}25

^{th}

### 99 Bottles of Beer

11^{th}108

^{th}

### Abundant Numbers

16^{th}17

^{th}4

^{th}

### Arabic to Roman

7^{th}

### Brainfuck

### CSS Colors

### Christmas Trees

17^{th}128

^{th}

### Cubes

4^{th}41

^{st}

### Diamonds

10^{th}85

^{th}

### Divisors

55^{th}16

^{th}

### Emirp Numbers

24^{th}61

^{st}

### Evil Numbers

29^{th}77

^{th}15

^{th}

### Fibonacci

65^{th}23

^{rd}

### Fizz Buzz

78^{th}135

^{th}49

^{th}

### Happy Numbers

25^{th}50

^{th}

### Leap Years

31^{st}60

^{th}

### Leyland Numbers

### Lucky Tickets

### Morse Decoder

### Morse Encoder

43^{rd}

### Niven Numbers

40^{th}51

^{st}

### Odious Numbers

23^{rd}33

^{rd}14

^{th}

### Ordinal Numbers

24^{th}

### Pangram Grep

36^{th}

### Pascal’s Triangle

23^{rd}76

^{th}

### Pernicious Numbers

18^{th}48

^{th}8

^{th}

### Poker

### Prime Numbers

13^{th}38

^{th}27

^{th}61

^{st}24

^{th}

### Quine

193^{rd}65

^{th}

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

24^{th}

### Roman to Arabic

31^{st}

### Rule 110

7^{th}59

^{th}

### Seven Segment

### Sierpiński Triangle

14^{th}74

^{th}

### Spelling Numbers

### Sudoku

### Ten-pin Bowling

### United States

26^{th}

### λ

6^{th}33

^{rd}

### π

10^{th}96

^{th}7

^{th}

### τ

5^{th}58

^{th}8

^{th}

### φ

6^{th}32

^{nd}7

^{th}

### √2

7^{th}30

^{th}6

^{th}

### 𝑒

3^{rd}15

^{th}11

^{th}8

^{th}5

^{th}29

^{th}14

^{th}5

^{th}11

^{th}2

^{nd}7

^{th}8

^{th}75

^{th}18

^{th}19

^{th}3

^{rd}3

^{rd}