12 Days of Christmas
Abundant Numbers
Arabic to Roman
brainfuck
Christmas Trees
Divisors
Emirp Numbers
Evil Numbers
Fibonacci
64th
Fizz Buzz
139th
Happy Numbers
Leap Years
Niven Numbers
Odious Numbers
Pangram Grep
Prime Numbers
Quine
1st25th190th91st29th51st264th1st1st38th49th
π
√2