Roy was playing a game with n similar coins.he was in need of arranging all the coins in a way such that atleast one coin must be in contact with all other coins.find max no of coins that he can arrange...

• if talking about 2D(arrangement on a table).
  total no of coins=7: 1 in centre and 6 surrounding it.
  
  Mathematical reason: due to equal radius every two adjacent surrounding coins and centeral coin will form an equilateral triangle between the 3 centers due to equal radius. Thus 60deg angle btwn two coins surrounding central coin.
  so total surrounding coins =360/60=6. and 1 coin in the center.
  
  practically also proved!
• 11 years agoHelpfull: Yes(27) No(0)
• 9
  ooo
  o0o
  ooo including 0 all 9 coins are contected with each other
• 11 years agoHelpfull: Yes(6) No(12)
• can you xpln in detail
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• 7
  one at centre.. and 6 around that
  
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• pplzz explain??????
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• 0
  O
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• answer is 4 coin 0
  because 3 coin as shown here 0 0 and 1 coin is on that thus all coin contact with each other
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• 6
  take coine and check out
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