Henry Wan, Ph.D.
The following important tips will help you perform your best on the AMC 10/12. Read them carefully — they can make a big difference on test day!
Before the Test
- Bring the right materials:
Bring several #2 pencils, good erasers, blank scratch paper, a ruler, and a quality compass.
- Use proper writing tools:
Use a soft-lead No. 2 pencil for both marking answers and working on scratch paper.
Do not use a mechanical pencil or pen — these may cause your answer sheet to be scored incorrectly.
During the Test
- Pace yourself.
Each problem is worth the same number of points. Don’t spend too much time on any single question. - Read carefully.
Make sure you understand what each question is asking before you begin solving it. - Answer easy questions first.
Quickly go through the test and answer all the questions you find straightforward. Then return to the more difficult ones if time allows. - Be strategic about guessing.
Scoring works as follows:- Correct answer: 6 points
- Blank answer: 1.5 points
- Incorrect answer: 0 points
Unless you are fairly sure of your answer, it is better to leave a question blank than to guess randomly.
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- If you can narrow down to 2 possible answers, guessing is advantageous.
- If you can only eliminate 1 or 2 of the 5 options (leaving 3–4 possible answers), guessing is not advantageous statistically.
If Time Is Running Out
- Stay calm and focused.
For the last 5–7 challenging problems, don’t panic or rush. - It’s often better to leave them blank unless you can make an educated guess based on logic or elimination.
- If you decide to guess, remember:
➤ Statistically, the correct answer is more likely to be B, C, or D. - Trust your intuition and reasoning.
Your instincts — shaped by practice and experience — can often guide you to the right choice.
Statistical Summary of Correct Answers on Past AMC 10/12 Exams
| Choice | % in the Last 5 Problems | % in the Last 10 Problems | % in the Last 15 Problems | % in the Last 20 Problems | % in the All 25 Problems |
| A | 19% | 15.9% | 15.9% | 15.2% | 14.2% |
| B | 21.8% | 23.2% | 23.2% | 23% | 23.1% |
| C | 24.5% | 22.7% | 22.7% | 25.5% | 25.5% |
| D | 22.7% | 23.2% | 23.2% | 24.1% | 23.6% |
| E | 11.8% | 15% | 15% | 12.3% | 13.6% |
Before Time Is Called
- Check your answers if you finish early.
Review all marked answers and ensure your choices are clear and correct. - Mark your answers properly.
Erase any stray marks completely and neatly so the scanner reads your answers correctly.
Best Wishes for Your AMC 10/12!
Stay confident, think carefully, and trust your preparation.
Good luck — you’ve got this!

Conclusion
Drawing a good diagram is a fundamental skill in solving geometry problems. It enhances understanding, organizes key information, reduces errors, reveals crucial properties, displays patterns, supports logical reasoning, and facilitates the application of theorems. Whether tackling a school assignment, preparing for math competitions, or solving complex geometric proofs, investing a few moments in creating an accurate and well-structured diagram can be the key to success. By developing strong diagram-drawing habits, students can approach geometry problems with confidence and efficiency.




