Solution

195098

Problem / game
Square It Back to problem
First name
Aaron
Country
United Kingdom, UK
Age
0

This works for all the odd number grid sizes except 3:
1. Place your triangle in the middle
2. Place your triangle diagonally right and up from the middle
3. Place your triangle diagonally right and down from the middle and you have one
4. Place your triangle diagonally left and down from the middle
5. Place your triangle in the bottom middle of the grid