IKMC 2027 - Grades 5-6 - Self-study SET 7 - Thematic Batch 3 Question 25

Peter paints the outside faces of a solid 3×4×5 rectangular wooden block red, then cuts it into unit cubes. How many of the small cubes have exactly two red faces?



Source wording note: “các mặt xung quanh” is ambiguous. To use the source-intended answer A, this exercise explicitly takes it to mean all six exterior faces, not just four lateral faces.