12 Days of Christmas
Abundant Numbers
3,246th
Collatz
2,288th
Divisors
4,153rd
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)
1,612th
Prime Numbers
3,948th
Tongue-twisters