12 Days of Christmas
812
99 Bottles of Beer
711
Abundant Numbers
636
Abundant Numbers (Long)
756
Arabic to Roman
372
Arithmetic Numbers
717
Arrows
320
Ascending Primes
206
ASCII Table
452
Card Number Validation
481
Catalan Numbers
348
Christmas Trees
685
Collatz
843
CSS Colors
195
Cubes
518
Day of Week
513
Diamonds
344
Divisors
729
Emirp Numbers
542
Emirp Numbers (Long)
522
Emojify
297
Evil Numbers
545
Evil Numbers (Long)
506
Factorial Factorisation
270
Fibonacci
623
Fizz Buzz
694
Foo Fizz Buzz Bar
671
Fractions
610
Happy Numbers
626
Happy Numbers (Long)
550
ISBN
735
Kaprekar Numbers
254
Leap Years
633
Leyland Numbers
788
Look and Say
529
Lucky Numbers
409
Mandelbrot
278
Medal Tally
486
Morse Decoder
270
Morse Encoder
279
Niven Numbers
601
Niven Numbers (Long)
660
Number Spiral
243
Odious Numbers
537
Odious Numbers (Long)
505
Ordinal Numbers
568
Pangram Grep
574
Partition Numbers
347
Pascal’s Triangle
501
Pernicious Numbers
501
Pernicious Numbers (Long)
568
Prime Numbers
497
Prime Numbers (Long)
542
Recamán
670
Rijndael S-box
154
Rock-paper-scissors-Spock-lizard
522
ROT13
378
Scrambled Sort
760
Seven Segment
523
SI Units
461
Sierpiński Triangle
311
Spelling Numbers
331
Tic-tac-toe
342
Time Distance
471
Tongue-twisters
642
United States
243
Vampire Numbers
95
Van Eck Sequence
751
Zeckendorf Representation
576
Zodiac Signs
303
π
106