A solid cube is coloured red on all faces. It is cut into 64 smaller cubes of equal size. How many small cubes have no face coloured ?
एक ठोस घन सभी पृष्ठों पर लाल रंग से रंगा गया है। अब इसे 64 छोटे घनों में काटा जाता है, ऐसे कितने छोटे घन होंगे जिनका कोई पृष्ठ रंगा हुआ नहीं हो ?
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Correct answer: C. 8
Explanation
Cut into 4 × 4 × 4. Cubes with no face coloured are the inner (4 − 2)³ = 8.
4 × 4 × 4 में कटे; बिना रंग वाले भीतरी घन = (4 − 2)³ = 8।
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