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Problem 3 - Entrance Test

A recipe for making cookies calls for a ratio of 2:3 of sugar to flour. If you need 6 cups of sugar, how many cups of flour do you need?

Correct: C

The ratio of sugar to flour is 2:3. If you need 6 cups of sugar, which is 3 times 2, you need 3 times 3 cups of flour. So, 3 * 3 = 9 cups of flour.