Weighted Balls

If belonging to 10 species of each kind of balls numbered 10 pieces. Given the nine types of balls have the same weight of 1 gram, while one type of ball has a weight of 1.1 grams. How can we know what different types of balls when we were given only a one-time opportunity to weigh these balls? SOLUTION: Give numbers to them type of ball from the 10-10. Then take it..

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