प्रथम पाँच अभाज्य संख्याओं का योग है:

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RRB Group D 13 Sept 2022 Shift 2 Official Paper
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  1. 28
  2. 29
  3. 27
  4. 26

Answer (Detailed Solution Below)

Option 1 : 28
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प्रयुक्त अवधारणा:

  अभाज्य संख्या: कोई भी संख्या जिसके केवल दो गुणनखंड होते हैं अर्थात 1 और स्वयं संख्या और किसी अन्य संख्या से विभाज्य नहीं होती है।

गणना:

प्रथम पाँच अभाज्य संख्याएँ हैं- 2,3,5,7 और 11

प्रथम पाँच अभाज्य संख्याओं का योग = 2 + 3 + 5 + 7 + 11

                                                   = 28

  ∴ सही उत्तर "28" है।

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