Solved IB ACIO Question
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Q · Dice and Cubemedium · 45s
A cube of side 80 cm is painted blue on all faces and cut into smaller cubes of side 16 cm each. How many smaller cubes have no faces painted?
TopicDice and Cube
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
n = 80/16 = 5. Number of cubes with no faces painted = (n - 2)³ = (5 - 2)³ = 3³ = 27.
Final Answer: Option A — 27