A Genius

Li Chenmo entered the office, shook hands with the principal, took his seat and said, "Principal, I'm here to register Dong Li and Dong Huang today."

The principal nodded and said, "We need to give the children some tests before we can decide which grade they will start."

Hearing this, Li Chenmo nodded and said, "We will follow the principal's arrangement."

The principal took out two examination papers and handed them to the Dong siblings. Everyone knew that the Dong siblings had never been to school, so the principal had already expected that they would fail the exam and planned to put them into the first grade.

But thirty minutes later, both Dong Li and Dong Huang had finished the exam. When the principal checked their answers, he was surprised.

Dong Huang answered 90% of the answers correctly and can be assigned to the second grade. But what surprised him even more was Dong Li. He answered all questions correctly.