20 10 national volume 2 is mathematics difficult?
Relatively speaking, it is estimated that the difficulty is more than 100. Most people score around 70-80. If there are 30 people, then 2 people are over 100, 3 people are over 90, 10 people are under 60, and the rest are 70-80. Don't worry, everyone is the same, but we can't divide it by math. We had a very difficult year, and none of us finished it. However, it is normal that the subject of mathematics is not finished, as long as we have done two big problems.