Question

1.
2.
3.
4.
Answer (Detailed Solution Below)

Option 2 : 12

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Detailed Solution

सही उत्तर 12 है।

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PrepSnapprepsnap.in • Part -A

Question:

A 3×3×3 cube has all its outer faces painted. How many of the small cubes have paint on exactly two faces? / एक 3×3×3 घन की सभी बाहरी फलकों पर रंग किया गया है। कितने छोटे घनों पर ठीक दो फलकों पर रंग होगा?

1.
8
2.
12
3.
6
4.
24

Correct Answer: 12

Exactly-two-face cubes sit at the middle of each of the 12 edges: 12 × 1 = 12. (8 corners have 3 painted faces; 6 face-centres have 1.) / ठीक दो फलक वाले घन 12 किनारों के मध्य में होते हैं: 12 × 1 = 12।

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