4. A cube is a vertex of a larger cube, in which case it has 3 neighbors.

Cases 2 and 4 are suitable. For each face of the cube, the number of cubes that satisfy case 2 is: $3 \times 3=9$. Since the cube has 6 faces, the total is 54 cubes. The cube has 8 vertices, so in total, Donut ate $54+8=62$ cubes.

## Clone 2

A cube $5 \times 5 \times 5$ was formed from 125 sugar cubes. Donut ate all the cubes that have an even number of neighbors (neighbors are those cubes that share a face). How many cubes did Donut eat in total?
Answer: 63

## Clone 3

A cube of $6 \times 6 \times 6$ was formed using 216 sugar cubes. Donut selected all the sugar cubes that have an odd number of neighbors and ate them (neighbors are those cubes that share a face). How many sugar cubes did Donut eat in total?

## Answer: 104

## Clone 4

A cube of $6 \times 6 \times 6$ was formed using 216 sugar cubes. Donut selected all the sugar cubes that have an even number of neighbors and ate them (neighbors are those cubes that share a face). How many sugar cubes did Donut eat in total?

## Answer: 112