how many 8 cu.cm sugar cubes can sandy put in a 4cm by 8cm by 8cm box?

Answer 1

If the sugar cubes each holds 8 cm^3
then each side is 2 cm

The cubes will fit in all directions so we can place 4x4x2 of them or 32 sugar cubes

or

Since fitting them evenly along each dimension is no problem
volume of box = 8x8x4 or 256 c^3
number of cubes = 256/8 = 32 cubes