1 The volume of the cube is 2 * 2 * 2 or 2 ^ 3 in ^ 3 while the volume of the large box is 10 * 10 * 10 or 10 ^ 3 in ^ 3.
2 The answer is 125. Just divide the large box to the volume of the cube 1000 / 8 = 125.
3 The box will hold the same number of balls as small boxes. With the balls, there is empty space.
4 The answer is still 125. Just find the volume of the box and of the cube. Divide the box volume by the cube volume.