Contest Results

2020 AIME I Answer Key Released

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Yesterday, selected middle school and high school students participated in this year’s AIME I Competition (including some students at Areteem Headquarters seen below).

Students taking the AIME exam at Areteem Headquarters.

The problems can now be discussed! See below for the answer key for both the 2020 AIME I questions as well as the concepts tested on each problem. All answers for the AIME are in the form of 3-digit integers.

1
547
geometry: angles in triangles
2
017
algebra: logarithms
3
621
number theory: number bases
4
093
number theory: factors and divisibility
5
052
combinatorics: overcounting and cases
6
173
geometry: tangent spheres and cross sections
7
081
combinatorics: combinatorial identities or cases
8
103
geometry and algebra: geometric series and complex numbers
9
077
combinatorics: probability, stars and bars
10
407
number theory: prime factorization, cases and logic
11
510
algebra: cases and function composition
12
270
number theory: binomial theorem or lifting the exponent
13
036
geometry: angle bisectors, incircles and circumcircles
14
085
algebra: quadratics and factor theorem
15
058
geometry: circumcircles, tangents, and transformations

Want to practice more AMC and AIME Problems? Check out the Zoom International Math League (ZIML) practice page here for practice resources, including Mock Exams and old Exams. The 2020 AIME I Problems are available as a PDF by clicking here.

The AIME I exam is administered by the Mathematical Association of America (MAA). Students are invited to take the AIME based on their scores for the AMC 10 and 12 exams. For general information about the AMC 10 and 12, click here.

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