Suppose you are given 12 coins, one of which is counterfeit and weighs a little more or less than the real coins. Using a two-pan balance scale, what is the minimum number of weighings necessary to find the counterfeit coin?
?
A. 7 weighings
B. 3 weighings
C. 1 weighings
D. 4 weighings
E. 6 weighings
Answer: B
Mathematics
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