in 27 coins one coin is counterfeit what is minimum number of waitings to find out counterfeit coin???

• Ans is 3.
  We make group of 9-9-9 coins.
  By 1st weighting we get 1 set of 9 coins having counterfiet coin.
  Then similarly divide that group in 3-3-3.
  And then in 1-1-1.
• 12 years agoHelpfull: Yes(6) No(0)
• answer pleaseeeeeeeeee
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