Abundant Numbers
272
Abundant Numbers (Long)
301
Arabic to Roman
317
Arithmetic Numbers
312
Catalan Numbers
423
Collatz
569
Day of Week
639
Divisors
418
Fibonacci
634
Fizz Buzz
421
Foo Fizz Buzz Bar
373
Fractions
424
ISBN
251
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