उस विकल्प का चयन कीजिए, जो आकृति में प्रश्नचिह्न के स्थान पर रखे जाने के लिए सर्वोत्तम उपयुक्त हो :

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Bihar CET B.Ed Official Paper (Held On: 25 Jun, 2024)
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  1. 72
  2. 78
  3. 108
  4. 90

Answer (Detailed Solution Below)

Option 1 : 72
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तर्क: त्रिभुज के अंदर की संख्या = (कोनों पर की संख्याओं का योग) × 2

चित्र 1: (4 + 9 + 6) × 2 = 19 × 2 = 38

चित्र 2: (8 + 11 + 9) × 2 = 28 × 2 = 56

चित्र 3: (12 + 11 + 13) × 2 = ?

कोनों पर की संख्याओं का योग = 12 + 11 + 13 = 36

त्रिभुज के अंदर की संख्या = 36 × 2

⇒ ? = 72

इसलिए, सही उत्तर "विकल्प 1" है। 

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