9 Kilograms of Rice

You have `9` kilograms of rice. How can you measure `2` kilograms of rice using three weighings on a balance scale and using two weights: one of `200` grams and one of `50` grams?

Difficulty level (1 very easy - 10 very hard): 2

Proof and Example -> Constructing an Example / Counterexample Algorithm Theory -> Weighing

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