About 30% -40% of the questions in the mathematics competition involve the Olympic content, which is mainly distributed in the last two questions of filling in the blanks and solving the questions. Common arithmetic question types include: calculation skills (quick and skillful calculation), number theory (integer division, prime, remainder), geometry (area, angle, stereogram), combination (arrangement combination, drawer principle), stroke problems, engineering problems, and logical reasoning. Remarks: 1. Reinforce the foundation and ensure that conventional question types do not lose points; 2. Conquer one topic per week with targeted exercises; 3. Attach importance to sorting out wrong questions and analyzing the causes of errors; 4. Mock exam, training time allocation ability; 5. Learn to name one thing versus the other, and master the problem solving method instead of rote memorization. It is recommended to practice 3-5 Olympic number problems every day, focusing on understanding ideas rather than chasing quantity.