Question 19
The pyramid below stands on a table. It is made of 84 small cubes stacked in 4 layers. How many small cubes cannot be seen?
Interpretation: count cubes completely covered inside the stack. A cube is not counted as hidden just because it is on the far side of the printed picture.
Interpretation: count cubes completely covered inside the stack. A cube is not counted as hidden just because it is on the far side of the printed picture.