12 Days of Christmas
💎
5th
99 Bottles of Beer
2nd
6th
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
2nd
Catalan Numbers
1st
1st
Catalan’s Constant
1st
2nd
Christmas Trees
1st
13th
Collatz
2nd
8th
Cubes
💎
11th
Diamonds
4th
1st
Divisors
1st
1st
Emirp Numbers
8th
5th
Emirp Numbers (Long)
9th
17th
Evil Numbers
6th
1st8th
Evil Numbers (Long)
1st
1st4th
Factorial Factorisation
2nd
7th
Farey Sequence
1st
Fibonacci
1st
1st
Fizz Buzz
1st299th
Foo Fizz Buzz Bar
1st
1st
Fractions
1st
1st
Game of Life
19th
Gijswijt’s Sequence
26th
Happy Numbers
1st
1st
Happy Numbers (Long)
1st
16th
Hexdump
25th
Intersection
1st
9th
Inventory Sequence
2nd
5th
ISBN
9th
9th
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
7th
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
1st3rd12th
Pangram Grep
1st
1st
Pascal’s Triangle
3rd
1st
Pernicious Numbers
5th
1st
Pernicious Numbers (Long)
1st
1st
Prime Numbers
1st
1st14th
Prime Numbers (Long)
1st
1st
Quine
1st
1st
Recamán
1st
8th
Repeating Decimals
1st
Reverse Polish Notation
1st
23rd
Rijndael S-box
6th
Roman to Arabic
1st
25th
ROT13
1st
1st
Rule 110
3rd
12th
Seven Segment
20th
Sierpiński Triangle
1st
10th
Smith Numbers
13th
Spelling Numbers
6th
15th
Tic-tac-toe
1st
3rd
Tongue-twisters
12th
Tower of Hanoi
10th
Transpose Sentence
22nd
United States
Vampire Numbers
3rd
3rd
Van Eck Sequence
5th
23rd
Zeckendorf Representation
19th
π
5th
1st
τ
4th
5th
φ
1st
1st
√2
1st
1st
𝑒
2nd
1st