
When discussing the way the pyramids were built we cannot afford to ignore one variable: TIME. Because what seems to be the hardest task becomes feasible with simple approaches in a sufficiently long timeframe.
The great pyramid (GP) took about 26 years to build with its 2.3 million blocks. We could consider the average time per block (4.12 days) to expect that at most it took about 8 days to place the hardest blocks. But that only has meaning under the assumption that the timeframe does not depend on the location of the block inside the GP.
A much more meaningful result is to average per course (block layer, or step, which total 206) because the added difficulty of moving bocks higher is somewhat cancelled by the fact that higher layers take fewer blocks to complete. This gives about EIGHT YEARS per layer as average, hence at most it could have taken SIXTEEN YEARS to complete a layer. 16 years is more than enough to move a 9 ton block up to the summit of the GP — with very simple mechanics.
Now you can divide the height of the pyramid by the timeframe to completion and you get the most simple formulation of the Egyptian pyramid building technique:
They only had to solve the mechanical problem of moving a several ton block up by X cm each time, making sure it cannot slip back down, and probably only do it once per day