Abundant Numbers
642
642
638
814
671
Arrows
439
Collatz
732
764
CSS Colors
198
Emirp Numbers
374
Evil Numbers
800
Fibonacci
947
Fizz Buzz
766
693
983
564
Foo Fizz Buzz Bar
780
1,000
Fractions
753
Happy Numbers
508
Happy Numbers (Long)
511
ISBN
580
Niven Numbers
570
786
Odious Numbers
800
Ordinal Numbers
736
Pangram Grep
837
Pernicious Numbers
370
Prime Numbers
465
Prime Numbers (Long)
352
Quine
734
694
969
RecamΓ‘n
477
Smith Numbers
556
Tongue-twisters
597
755
United States
192
β2
690
π
686