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కింద వాటిలో ఏది సంయుక్త ప్రధాన సంఖ్యల జత కాదు?

This question was previously asked in
RRC Group D Previous Paper 40 (Held On: 15 Oct 2018 Shift 2)
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  1. 197, 199
  2. 167, 169
  3. 137, 139
  4. 107, 109

Answer (Detailed Solution Below)

Option 2 : 167, 169
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కాన్సెప్ట్:

సంయుక్త ప్రధాన సంఖ్యలంటే ప్రధాన సంఖ్యలై ఉండి వాటి మధ్య తేడా రెండు (2) గా ఉంటుంది. మరో పదాల్లో, ప్రధానసంఖ్యల మధ్య ప్రధాన తేడా రెండుగా ఉండే సంఖ్యలు.

లెక్కింపు:

167, 169 కాక మిగతావన్నీ సంయుక్త ప్రధాన సంఖ్యలు

169 అనేది 13 యొక్క గుణిజం కాబట్టి అది ప్రధాన సంఖ్య లేదా సంయుక్త ప్రధాన సంఖ్య రెండూ కాదు.

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