Disk Pyramid Puzzle

Topic:
Pyramid
Use the fewest number of moves possible to turn the pyramid upside down. What is the fewest moves with 2 rows? 3 rows? 4 rows? 5 rows? 6 rows?
Use the fewest number of moves possible to turn the pyramid upside down. What is the fewest moves with 2 rows? 3 rows? 4 rows? 5 rows? 6 rows?