Sasha can complete 15 questions an hour. If she has 60 questions to complete and she works for 2 hours, how many questions does she still need to complete?
Sasha completes 15 questions/hour * 2 hours = <<15*2=30>>30 questions.
This means there are still 60 questions – 30 questions = <<60-30=30>>30 questions left to complete.
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