Answer sheet
2018 AMC 10B
25 problems · 75 minutes. Print this, do the paper, then type the answers in to have it scored and filed.
The marking key prints on its own sheet, after the answer sheet. Keep that page — it carries the correct answers and each problem's topic.
2018 AMC 10B — answer sheetAMC 10 Step by Step
Name: Date: September 13, 2026
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Correct ____ × 6 = ______Blank ____ × 1.5 = ______Score ________
2018 AMC 10B — marking keyAMC 10 Step by Step
Name: Date: September 13, 2026
Keep this sheet. The topic column says what to practise next, not just what was wrong.
Marking key
| # | Answer | Topic | Difficulty |
|---|---|---|---|
| 1 | A | Basic Counting | 1 / 5 |
| 2 | D | Linear Equations & Word Problems | 1 / 5 |
| 3 | B | Basic Counting | 1 / 5 |
| 4 | B | Systems of Equations | 2 / 5 |
| 5 | D | Basic Counting | 1 / 5 |
| 6 | D | Basic Probability | 2 / 5 |
| 7 | D | Circles | 2 / 5 |
| 8 | C | Sequences & Series | 2 / 5 |
| 9 | D | Basic Probability | 2 / 5 |
| 10 | E | Solid Geometry | 3 / 5 |
| 11 | C | Primes | 3 / 5 |
| 12 | C | Triangle Centers & Cevians | 3 / 5 |
| 13 | C | Modular Arithmetic | 3 / 5 |
| 14 | D | Statistics & Data | 3 / 5 |
| 15 | A | Solid Geometry | 3 / 5 |
| 16 | E | Modular Arithmetic | 3 / 5 |
| 17 | B | Triangles: Area & Pythagorean | 4 / 5 |
| 18 | D | Arrangements with Restrictions | 4 / 5 |
| 19 | E | Divisibility & Factors | 4 / 5 |
| 20 | B | Sequences & Series | 3 / 5 |
| 21 | C | Divisibility & Factors | 4 / 5 |
| 22 | C | Geometric Probability | 4 / 5 |
| 23 | B | GCD & LCM | 4 / 5 |
| 24 | C | Quadrilaterals & Polygon Areas | 4 / 5 |
| 25 | C | Number Properties | 5 / 5 |