6 kyu
Difference of Squares
65
2 kyu
Arrow Puzzle
16
5 kyu
An Infinite Sum
33
3 kyu
Naturals to Rationals
34
6 kyu
The OR sum
72
6 kyu
N in a row
81
5 kyu
Smallest Multiple of 1 to n
71
6 kyu
Add 'Em Pairs!
77
5 kyu
Divisors Of Really Big Numbers
39
7 kyu
[Code Golf] Save Your Students
112
7 kyu
[Code Golf] An Interesting Ritual
181
4 kyu
Multiplying Polynomials
179