Incorrect
Explanation
The remaining cube will be 8x8x8. This will be 512. A layer is taken from all sides of the cube, so it would reduce the dimensions be 2.
Solve this puzzle
Tom was on the way to the park. He met a man with 7 wives and each of them was with 7 kids. So, in total, how many were going to the park?
49 50 1 2