12 Days of Christmas
99 Bottles of Beer
Abundant Numbers
CSS Colors
Cubes
Diamonds
Divisors
Emirp Numbers
Emojify
Evil Numbers
Fibonacci
Fizz Buzz
Happy Numbers
Leap Years
Morse Decoder
Odious Numbers
Ordinal Numbers
Pangram Grep
Pascal’s Triangle
Pernicious Numbers
Poker
Prime Numbers
4,109th
4,433rd
3,592nd
2,375th
4,468th
3,859th
3,749th
1,586th
3,510th
4,502nd
1,863rd
1,444th
4,169th
4,112th
3,410th
3,054th
3,267th
1,955th
4,018th
2,537th
4,405th
3,801st
2,104th
3,909th
3,110th
Roman to Arabic
Rule 110
Spelling Numbers
√2