2x2x2
4x4x4 - random turning, which later I found out to be a complicated reduction, solved white side, then yellow side (first attempted layer by layer), and then I saw that it was too hard so I only went for the centers. Then I paired up edges (easy). I've already had experience with seeing that it was a 3x3x3.
5x5x5/6x6/7x7 - used reduction on 4x4x4
Rubik's Master Magic - solely from watching people, that counts? I mean they were doing it pretty fast
4x4x4 - random turning, which later I found out to be a complicated reduction, solved white side, then yellow side (first attempted layer by layer), and then I saw that it was too hard so I only went for the centers. Then I paired up edges (easy). I've already had experience with seeing that it was a 3x3x3.
5x5x5/6x6/7x7 - used reduction on 4x4x4
Rubik's Master Magic - solely from watching people, that counts? I mean they were doing it pretty fast