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A student answers 90 90​% of the questions on a math exam correctly. If he he answers 18 questions​ correctly, how many questions are on the​ exam?
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A student answers 90 90​% of the questions on a math exam correctly. If he he answers 18 questions​ correctly, how many questions are on the​ exam?

User EliSquared
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The answer would be ' 20 questions '.
User Enzo
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