In the morning, it took nearly 40 minutes for Song Yan to finish the Chinese exam because of the writing reasons.

But this subject is math in the afternoon. His answer speed is faster. He often sweeps through the multiple choice questions or fills in the blank judgment questions and has the answer in his mind.

So it's only twenty-five minutes before the exam begins to answer a complete math paper.

Take a few minutes to check, and find that the time is just past half an hour.

The exam stipulates that examinees are allowed to submit papers for 30 minutes.

When Song Yan came to the school gate, several...