Abundant Numbers
646
Abundant Numbers (Long)
775
Arrows
492
Collatz
971
Divisors
671
Emirp Numbers
557
Emirp Numbers (Long)
613
Evil Numbers
755
Evil Numbers (Long)
788
Factorial Factorisation
99
Fizz Buzz
547
Foo Fizz Buzz Bar
572
Happy Numbers
689
Happy Numbers (Long)
128
Leap Years
58
Niven Numbers
657
Odious Numbers
755
Odious Numbers (Long)
788
Pernicious Numbers
755
Prime Numbers
645
Prime Numbers (Long)
688
Quine
912
Sierpiński Triangle
101
Tongue-twisters
531