12 Days of Christmas
💎
7th
99 Bottles of Beer
2nd
8th
Abundant Numbers
1st
9th
Abundant Numbers (Long)
1st
8th
Arabic to Roman
13th
Arithmetic Numbers
4th
Ascending Primes
3rd
ASCII Table
1st
1st
Billiards
4th
Card Number Validation
3rd
Catalan Numbers
1st
1st
Catalan’s Constant
1st
4th
Christmas Trees
1st
16th
Collatz
2nd
11th
Cubes
💎
14th
Diamonds
4th
1st
Divisors
1st
1st
Emirp Numbers
8th
5th
Emirp Numbers (Long)
9th
19th
Evil Numbers
6th
1st8th
Evil Numbers (Long)
1st
1st5th
Factorial Factorisation
2nd
7th
Farey Sequence
1st
Fibonacci
1st
1st
Fizz Buzz
1st300th
Foo Fizz Buzz Bar
1st
1st
Fractions
1st
1st
Game of Life
22nd
Gijswijt’s Sequence
28th
Happy Numbers
1st
1st
Happy Numbers (Long)
1st
16th
Hexdump
27th
Intersection
1st
9th
Inventory Sequence
2nd
9th
ISBN
10th
10th
Jacobi Symbol
4th
Kolakoski Constant
💎
6th
Kolakoski Sequence
1st
1st
Leap Years
1st
1st
Levenshtein Distance
3rd
Leyland Numbers
4th
8th
Look and Say
1st
6th
Lucky Numbers
8th
9th
Lucky Tickets
1st
1st
Niven Numbers
1st
1st
Niven Numbers (Long)
1st
Number Spiral
5th
5th
Odious Numbers
6th
1st1st
Odious Numbers (Long)
1st
1st
Ordinal Numbers
1st
3rd5th
PalindromemordnilaP
1st3rd15th
Pangram Grep
1st
1st
Pascal’s Triangle
3rd
1st
Pernicious Numbers
5th
1st
Pernicious Numbers (Long)
1st
1st
Prime Numbers
1st
1st16th
Prime Numbers (Long)
1st
1st
Quine
1st
1st
Recamán
1st
8th
Repeating Decimals
1st
Reverse Polish Notation
1st
24th
Rijndael S-box
6th
Roman to Arabic
1st
26th
ROT13
1st
1st
Rule 110
3rd
12th
Seven Segment
21st
Sierpiński Triangle
2nd
10th
Smith Numbers
14th
Spelling Numbers
6th
16th
Tic-tac-toe
1st
3rd
Tongue-twisters
12th
Tower of Hanoi
11th
Transpose Sentence
23rd
United States
Vampire Numbers
3rd
4th
Van Eck Sequence
5th
24th
Zeckendorf Representation
21st
π
5th
1st
τ
4th
5th
φ
1st
1st
√2
1st
1st
𝑒
2nd
1st