Abundant Numbers
277
Abundant Numbers (Long)
309
Arabic to Roman
325
Arithmetic Numbers
321
Catalan Numbers
436
Collatz
582
Day of Week
667
Divisors
425
Fibonacci
643
Fizz Buzz
424
Foo Fizz Buzz Bar
379
Fractions
438
ISBN
280
455
Jacobi Symbol
351
Leap Years
597
Leyland Numbers
291
ln 2
520
Niven Numbers
550
Pernicious Numbers
471
Pernicious Numbers (Long)
531
Prime Numbers
444
Prime Numbers (Long)
478
π
158
𝑒
706