12 Days of Christmas
26th
99 Bottles of Beer
20th
Abundant Numbers
8th
Abundant Numbers (Long)
1st
Arithmetic Numbers
1st1st
Ascending Primes
4th
ASCII Table
11th
Card Number Validation
Christmas Trees
5th
Collatz
9th
Cubes
12th
Day of Week
1st
Diamonds
9th
Divisors
1st💎
Emirp Numbers
14th
Emirp Numbers (Long)
10th
Evil Numbers
5th
Evil Numbers (Long)
1st
Factorial Factorisation
8th
Farey Sequence
26th
Fibonacci
3rd
Fizz Buzz
1st
Foo Fizz Buzz Bar
12th
Fractions
16th
Game of Life
24th
Gijswijt’s Sequence
10th
Happy Numbers
52nd
Happy Numbers (Long)
9th
Intersection
3rd2nd
Inventory Sequence
2nd
ISBN
4th
Jacobi Symbol
6th
Kaprekar Numbers
11th
Kolakoski Sequence
30th
Leap Years
7th
Levenshtein Distance
13th
Leyland Numbers
13th
Look and Say
6th
Lucky Numbers
15th
Lucky Tickets
8th
Mahjong
5th
Maze
8th
Medal Tally
2nd
N Queens
8th
Niven Numbers
1st
Niven Numbers (Long)
7th
Number Spiral
30th
Odious Numbers
14th
Odious Numbers (Long)
12th
Ordinal Numbers
11th
PalindromemordnilaP
8th
Pangram Grep
Pascal’s Triangle
7th
Pernicious Numbers
1st
Pernicious Numbers (Long)
6th
Prime Numbers
7th
Prime Numbers (Long)
1st10th
Proximity Grid
8th
Quine
30th
Recamán
1st
Repeating Decimals
6th
Reverse Polish Notation
9th
Reversi
2nd💎
Rijndael S-box
13th
ROT13
6th
Rule 110
9th
Seven Segment
13th
Sierpiński Triangle
23rd
Smith Numbers
6th
Sudoku (Fill-in)
6th
Tic-tac-toe
7th
Transpose Sentence
6th
United States
26th
Vampire Numbers
7th
Van Eck Sequence
1st
Zeckendorf Representation
11th
π
12th
√2
18th