The answers is 4mm for the side length of the cube.
The 95 thesis was written to speak out against the wrongdoing of the church and the pope. All of the other answers don’t necessarily make sense, because he did not write it to be famous, to be the pope, etc.
4/10 is equal to 4 out of 10 or 40%
This means you should shade 4 of the 10 blocks