Скачать или смотреть AMC 10A & AMC 12A 2025 Complete Walkthrough (Timestamps + Extra Practice Below)

The problems on this page are the property of the MAA's American Mathematics Competitions
https://maa.org/student-programs/amc/

Here is the 2025 AMC 10A Google Form to see your score.
https://docs.google.com/forms/d/1036V...

2025 AMC 10A Keys are as follows
0:00 Problem 1 Key is E)4:30PM Arithmetic,Speed-Rate Problem
1:31 Problem 2 Key is B)4 Percents-Mixture
3:28 Problem 3 Key is D)3037 Triangle Inequality,Counting
6:30 Problem 4 Key is A)28 System of Equations-Word Problem
9:56 Problem 5 Key is E)45 An Interesting Sequence,Pattens
13:30 Problem 6 Key is C)100 Angle Chasing
16:10 Problem 7 Key is E)18 Remainder Theorem
17:18 Problem 8 Key is B)1 Logic and Reasoning
20:27 Problem 9 Key is C)3 Graphs of Polynomials,Transformations
24:04 Problem 10 Key is C)10pi Pythagorean Theorem,Circles
25:37 Problem 11 Key is E)149 Arithmetic and Geometric Sequences
27:31 Problem 12 Key is D)464 Casework Counting with digits
31:17 Problem 13 Key is D)3/4 Areas with Geometric Series
33:28 Problem 14 Key is B)1/5 Circular Permutations
35:06 Problem 15 Key is A)3/8 Pythagorean Theorem,Similar Triangles
38:48 Problem 16 Key is D)17/9 Expexted Value
42:41 Problem 17 Key is E)4 Remainders
46:24 Problem 18 Key is B)-3/2 Vieta's Relations and Harmonic Mean
50:08 Problem 19 Key is A)-29 Recurrences, Pascal's Triangle and Patterns
56:05 Problem 20 Key is A)119 3D Geometry, Point to line Distance,Tangents
1:05:59 Problem 21 Key is C)10 Counting with Sets
Problem 22 Key isB)6/23 Descarte's Circle Theorem   • 2025 AMC 10A Problem 23-Angle Bisector Len...  
Problem 23 Key is D)21 Angle Bisector Length Formula and Angle Bisector Theorem    • 2025 AMC 10A Problem 23-Angle Bisector Len...  
Problem 24 Key is C)9841 Unimodel Sequences    • 2025 AMC 10A Problem 24 and AMC 12A Proble...  
Problem 25 Key is A)25 Geometric Probability    • 2025 AMC 10A Problem 25-Geometric Probabil...  

2025 AMC 12A Keys are as follows
2025 AMC 12A Problems in the Google Form. You will get some recommendation for the problem missed after submitting the form. https://docs.google.com/forms/d/1JG3v...
0:00 Problem 1 Key is E)4:30 Arithmetic,Speed-Rate Problem
1:31 Problem 2 Key is B)4 Percents-Mixture
6:30 Problem 3 Key is A)28 System of Equations-Word Problem
17:18 Problem 4 Key is B)1 Logic and Reasoning
31:17 Problem 5 Key is D)3/4 Areas with Geometric Series
33:28 Problem 6 Key is B)1/5 Circular Permutations
Problem 7 Key is C)22 Logarithms and System of Equations    • 2025 AMC 12A Problem 7-Logarithm Properties  
Problem 8 Key is E)63/11 Cyclic,Angle Bisector Theorem and Law of Cosines    • 2025 AMC 12 Problem 8-Law of Cosine, Angle...  
Problem 9 Key is E)5/3 Complex Numbers and Lines    • 2025 AMC 12 Problem 9-Complex Numbers Basics  
Problem 10 Key is B Radians and System of Equations,Arc Length    • 2025 AMC 12A Problem 10 Arc Length and Sol...  
Problem 11 Key is A)5 Perpendicular Line, Orthocenter,Coordinates    • 2025 AMC 12A Problem 11-Orthocenter and Co...  
46:24 Problem 12 Key is B)-3/2 Vieta's Relations and Harmonic Mean
Problem 13 Key is D)1/26 Counting with Subsets and Probability    • 2025 AMC 12A Problem 13 Counting Subsets a...  
Problem 14 Key is D)22/23    • AMC 12A Problem 14 Similar Ellipses  
1:05:59 Problem 15 Key is C)10
Problem 16 Key is D)21    • 2025 AMC 10A Problem 23-Angle Bisector Len...  
Problem 17 Key is A)6    • 2025 AMC 12A Problem 17-Complex Numbers  
Problem 18 Key is C)186    • 2025 AMC 12A Problem 18-Casework Counting  
Problem 19 Key is E)k    • 2025 AMC 12A Problem 19-Vieta's Relations  
Problem 20 Key is C)528    • 2025 AMC 12A Problem 20-Pentahedron  
Problem 21 Key is A)8    • 2025 AMC 12A  problem 21-Diophantine Equat...  
Problem 22 Key is E)1/4    • 2025 AMC 12A Problem 22-Geometric Probability  
Problem 23 Key is C)9841    • 2025 AMC 10A Problem 24 and AMC 12A Proble...  
Problem 24 Key is C)7    • 2025 AMC 12A Problem 24-Law of Cosine and ...  
Problem 25 Key is E)13