Abundant Numbers
272
Abundant Numbers (Long)
301
Arabic to Roman
317
Arithmetic Numbers
318
Catalan Numbers
424
Collatz
570
Day of Week
642
Divisors
419
Fibonacci
634
Fizz Buzz
421
Foo Fizz Buzz Bar
374
Fractions
393
ISBN
253442
Jacobi Symbol
338
Leap Years
588
Leyland Numbers
284
ln 2
505
Niven Numbers
540
Pernicious Numbers
460
Pernicious Numbers (Long)
517
Prime Numbers
436
Prime Numbers (Long)
466
π
155
𝑒
689