निम्नलिखित में से कौन-सी एक भाज्य संख्या है?

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RRB ALP CBT I 30 Aug 2018 Shift 3 Official Paper
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  1. 51
  2. 41
  3. 61
  4. 31

Answer (Detailed Solution Below)

Option 1 : 51
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प्रयुक्त अवधारणा:

1. भाज्य संख्या एक धनात्मक पूर्णांक है जिसे दो छोटे धनात्मक पूर्णांकों को गुणा करके बनाया जा सकता है।

2. अभाज्य संख्याएँ प्राकृतिक संख्याएँ (>=2) होती हैं जो केवल 1 और स्वयं संख्या से विभाज्य होती हैं। 

गणना:

51 = 3 × 17

41 = 41 × 1

61 = 61 × 1

31 = 31 × 1

∴ विकल्पों में से केवल 51 एक संयुक्त संख्या है।

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