12 Days of Christmas
417
Abundant Numbers
707
Abundant Numbers (Long)
947
Arithmetic Numbers
779
Ascending Primes
678
Catalan Numbers
566
Catalan’s Constant
213
Collatz
808
Divisors
851
Emirp Numbers
336
Emirp Numbers (Long)
708
Evil Numbers
840
857
Evil Numbers (Long)
923
868
Factorial Factorisation
162
Farey Sequence
494
Fibonacci
683
Fizz Buzz
753
941
505
Foo Fizz Buzz Bar
677
902
Fractions
974
Happy Numbers
269
Happy Numbers (Long)
463
Leap Years
761
Look and Say
707
Medal Tally
442
Niven Numbers
588
Niven Numbers (Long)
915
Odious Numbers
857
875
Odious Numbers (Long)
960
876
Pangram Grep
609
Pernicious Numbers
783
Pernicious Numbers (Long)
803
Prime Numbers
627
Prime Numbers (Long)
841
Quine
656
Recamán
615
Time Distance
545
Tongue-twisters
279
United States
230
π
84