12 Days of Christmas
814
Abundant Numbers
776
Arabic to Roman
620
Christmas Trees
791
Cubes
516
Diamonds
644
Divisors
1,000
Emirp Numbers
613
Evil Numbers
874
1,000
Fibonacci
870
973
Fizz Buzz
983
Happy Numbers
729
Leap Years
827
Morse Decoder
604
Morse Encoder
636
Niven Numbers
963
978
Odious Numbers
883
1,000
Ordinal Numbers
931
Pangram Grep
774
Pascal’s Triangle
964
Pernicious Numbers
615
Prime Numbers
889
Quine
969
Rock-paper-scissors-Spock-lizard
687
Roman to Arabic
458
Rule 110
387
Seven Segment
730
Sierpiński Triangle
744
Spelling Numbers
383
United States
449
φ
716
√2
721