This Problem Set is a part of the Lesson 18, Unit 7, Grade 6. Mai, Clare, and Noah are making signs to advertise the school dance. It takes Mai 6 minutes to complete a sign, it takes Clare 8 minutes to complete a sign, and it takes Noah 5 minutes to complete a sign. They keep working at the same rate for a half hour. Will Mai and Clare complete a sign at the same time? Explain your reasoning.