How many cubes will you remove from 3×3×3 rubik's cube of side length 3cm to make it a 2×2×2 cube. [3 MARKS]
Concept: 1 Mark
Application: 2 Marks
Number of cubes in the bigger Rubik’s cube =3×3×3=27
Number of cubes in the smaller cube =2×2×2=8
So Total number of cubes to be removed =27−8=19.