Gold coins

Logic Level 3

There are 10 bags with gold coins (bag 1, 2 , 3, ....10). One of the bags has fake gold coins. The gold coin weight is 1,0 kg and a fake coin weights 1,1 kg. You have a weight meter and you are allowed to make just one reading, What is the minimum amount of coins you must collect from the bags to determine which of them has fake gold coins?

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