Answer sheet
2021 AMC Fall 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.
2021 AMC Fall 10B — answer sheetAMC 10 Step by Step
Name: Date: September 13, 2026
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Correct ____ × 6 = ______Blank ____ × 1.5 = ______Score ________
2021 AMC Fall 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 | E | Bases & Digits | 1 / 5 |
| 2 | B | Quadrilaterals & Polygon Areas | 1 / 5 |
| 3 | E | Algebraic Manipulation | 1 / 5 |
| 4 | C | Linear Equations & Word Problems | 2 / 5 |
| 5 | E | Exponents, Logarithms & Radicals | 1 / 5 |
| 6 | B | Divisibility & Factors | 2 / 5 |
| 7 | C | Fractions & Decimals | 3 / 5 |
| 8 | C | Primes | 2 / 5 |
| 9 | C | Ratios, Percents & Averages | 2 / 5 |
| 10 | A | Logic Puzzles | 2 / 5 |
| 11 | B | Circles | 3 / 5 |
| 12 | D | Algebraic Manipulation | 3 / 5 |
| 13 | B | Similar & Congruent Triangles | 3 / 5 |
| 14 | C | Basic Probability | 3 / 5 |
| 15 | D | Similar & Congruent Triangles | 4 / 5 |
| 16 | D | Expected Value | 3 / 5 |
| 17 | D | Coordinate Geometry | 4 / 5 |
| 18 | E | Quadrilaterals & Polygon Areas | 4 / 5 |
| 19 | A | Exponents, Logarithms & Radicals | 4 / 5 |
| 20 | C | Conditional Probability & States | 4 / 5 |
| 21 | E | Basic Counting | 4 / 5 |
| 22 | B | Modular Arithmetic | 4 / 5 |
| 23 | D | Basic Probability | 4 / 5 |
| 24 | A | Arrangements with Restrictions | 5 / 5 |
| 25 | E | Quadrilaterals & Polygon Areas | 5 / 5 |