Abundant Numbers (Long)
44th
Ascending Primes
30th
Collatz
41st
Diamonds
46th
Emirp Numbers
46th
Factorial Factorisation
24th
Fizz Buzz
146th
Foo Fizz Buzz Bar
44th
Intersection
26th
ISBN
30th
Leyland Numbers
9th41st
Mandelbrot
19th
Niven Numbers
85th
Partition Numbers
30th
Pernicious Numbers (Long)
36th
Reverse Polish Notation
19th
Time Distance
21st
Tower of Hanoi
28th
Trinomial Triangle
27th
√2
36th
𝑒
19th