### 12 Days of Christmas

13^{th}

### 99 Bottles of Beer

8^{th}

### Abundant Numbers

4^{th}

### Arabic to Roman

2^{nd}

### Brainfuck

2^{nd}

### CSS Colors

### Christmas Trees

5^{th}

### Cubes

4^{th}

### Diamonds

2^{nd}

### Divisors

7^{th}

### Emirp Numbers

2^{nd}

### Evil Numbers

10^{th}

### Fibonacci

2^{nd}

### Fizz Buzz

389^{th}56

^{th}

### Happy Numbers

4^{th}

### Leap Years

15^{th}

### Leyland Numbers

### Lucky Tickets

### Morse Decoder

### Morse Encoder

3^{rd}

### Niven Numbers

9^{th}

### Odious Numbers

9^{th}

### Ordinal Numbers

6^{th}

### Pangram Grep

2^{nd}

### Pascal’s Triangle

4^{th}

### Pernicious Numbers

5^{th}

### Poker

3^{rd}

### Prime Numbers

137^{th}12

^{th}

### Quine

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

1^{st}

### Roman to Arabic

23^{rd}3

^{rd}

### Rule 110

### Seven Segment

6^{th}

### Sierpiński Triangle

9^{th}

### Spelling Numbers

3^{rd}

### Sudoku

5^{th}

### Ten-pin Bowling

### United States

5^{th}