7
4
6
5
2
3
4
8
1
6
3
6
3
7
9
8
4
6
3
2
1
1
9
3
7
2
6
8
9
9
2
8
7
"I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
"I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
Practice solving puzzles at a difficulty level where you succeed 90% of the time. That's the zone of maximum skill growth.
Practice solving puzzles at a difficulty level where you succeed 90% of the time. That's the zone of maximum skill growth.