Arabic to Roman
10th
Christmas Trees
22nd
Divisors
1st
Emirp Numbers
31st
Evil Numbers
63rd
Fibonacci
35th
Fizz Buzz
61st
Happy Numbers
10th
Leap Years
41st
Niven Numbers
27th
Odious Numbers
56th
Pangram Grep
44th
Pascal’s Triangle
37th
Prime Numbers
37th
Quine
32nd
Sierpiński Triangle
9th
λ
9th
π
17th
τ
14th
φ
22nd
√2
16th
𝑒
18th