Nine balls
Imagine that you have exactly the same appearance as nine balls, of which one has a greater mass than the other. You have isosceles weights. Post a procedure as you would using weights to discover heavier balls. How many measurements at least do you have to do?
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You need to know the following knowledge to solve this word math problem:
arithmeticbasic operations and conceptsUnits of physical quantitiesthemes, topicsGrade of the word problem
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