12 Days of Christmas
812
99 Bottles of Beer
711
Abundant Numbers
636
Abundant Numbers (Long)
756
Arabic to Roman
320
Arithmetic Numbers
717
Arrows
320
Ascending Primes
200
ASCII Table
281
Card Number Validation
464
Catalan Numbers
348
Christmas Trees
685
Collatz
833
CSS Colors
195
Cubes
518
Day of Week
513
Diamonds
339
Divisors
710
Emirp Numbers
520
Emirp Numbers (Long)
504
Emojify
297
Evil Numbers
467
Evil Numbers (Long)
444
Factorial Factorisation
239
Fibonacci
623
Fizz Buzz
670
Foo Fizz Buzz Bar
671
Fractions
580
Happy Numbers
620
Happy Numbers (Long)
421
ISBN
555
Leap Years
633
Leyland Numbers
788
Look and Say
529
Lucky Numbers
409
Mandelbrot
275
Medal Tally
486
Morse Decoder
265
Morse Encoder
273
Niven Numbers
601
Niven Numbers (Long)
660
Number Spiral
243
Odious Numbers
450
Odious Numbers (Long)
443
Ordinal Numbers
568
Pangram Grep
490
Partition Numbers
80
Pascal’s Triangle
501
Pernicious Numbers
495
Pernicious Numbers (Long)
511
Prime Numbers
497
Prime Numbers (Long)
522
Recamán
670
Rijndael S-box
154
Rock-paper-scissors-Spock-lizard
402
ROT13
377
Scrambled Sort
746
Seven Segment
523
Sierpiński Triangle
263
Spelling Numbers
330
Tic-tac-toe
294
Time Distance
431
Tongue-twisters
628
United States
243
Vampire Numbers
95
Van Eck Sequence
422
Zeckendorf Representation
576
Zodiac Signs
276