12 Days of Christmas
152nd
Abundant Numbers
127th
Abundant Numbers (Long)
76th
Arithmetic Numbers
55th
Christmas Trees
105th
Collatz
160th
Diamonds
144th
Divisors
30th100th
Evil Numbers
241st
Evil Numbers (Long)
151st
Factorial Factorisation
44th
Fibonacci
156th108th
Fizz Buzz
32nd
183rd
Fractions
98th
Intersection
101st
Leap Years
148th
Look and Say
126th
Niven Numbers
180th
Niven Numbers (Long)
88th
Odious Numbers
134th
Odious Numbers (Long)
90th
Pascalβs Triangle
97th
Pernicious Numbers
134th
Prime Numbers
138th
Prime Numbers (Long)
42nd
ROT13
69th
Set
26th
Smith Numbers
60th
Tic-tac-toe
52nd
Ξ»
135th