She has six classes every day.

Question

She has six classes every day.

Each class is 40 minutes. Between classes there are a ten-minute break.
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Would you check the sentences?
Which one is incorrect?

Answer 1

Between classes there IS a ten minute break.

Answer 2

She has six classes every day.

Between classes there IS a ten minute break.

The sentences are correct grammatically and logically. There is no incorrect sentence in the given information.