Abundant Numbers
272
Abundant Numbers (Long)
301
Arabic to Roman
317
Arithmetic Numbers
313
Catalan Numbers
423
Collatz
569
Day of Week
640
Divisors
419
Fibonacci
634
Fizz Buzz
421
Foo Fizz Buzz Bar
373
Fractions
393
ISBN
252
441
Jacobi Symbol
337
Leap Years
588
Leyland Numbers
283
ln 2
503
Niven Numbers
539
Pernicious Numbers
460
Pernicious Numbers (Long)
515
Prime Numbers
436
Prime Numbers (Long)
465
π
155
𝑒
688