12 Days of Christmas
Abundant Numbers
3,238th
Collatz
2,311th
Divisors
4,190th
Emirp Numbers
Evil Numbers
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Happy Numbers
Happy Numbers (Long)
Jacobi Symbol
Leap Years
Niven Numbers
Niven Numbers (Long)
1,618th
Prime Numbers
3,957th
Tongue-twisters