 # 2020 AMC 8 Answer Key Released Posted by

Over the past week, thousands of middle school students have participated in this year’s AMC 8 Competition. Whether you took the AMC 8 at school or online, we hope it went well!

The last day of testing was November 16th, so now the problems can be discussed! See below for an answer key for the 2020 questions as well as the concepts tested on each problem.

1
E
arithmetic: ratios
2
C
arithmetic: averages
3
D
geometry: areas and units
4
B
counting and probability: patterns and geometry
5
C
arithmetic: fractions and percents
6
A
logic and orderings
7
C
counting and probability: digits and possible numbers
8
C
arithmetic: value of coins and logic
9
D
geometry: cubes, surfaces, and spatial reasoning
10
C
counting and probability: complementary counting
11
E
algebra: motion, averages speed, and graphs
12
A
algebra: factorials and rewriting expressions
13
B
arithmetic: ratios and probability
14
D
arithmetic: graphs, averages, and estimation
15
C
algebra: percents
16
E
algebra: sums and equations
17
B
number theory: factors and number of factors
18
A
geometry: circles, rectangles, and Pythagorean theorem
19
B
number theory: divisible and possible digits
20
B
arithmetic and logic: averages and remainders
21
A
counting and probability: counting paths and patterns
22
E
number theory: sequences and recursion
23
B
counting and probability: cases and logic
24
A
geometry and algebra: areas, percentages, and ratios
25
A
geometry and algebra: lengths and equations

This year’s AMC 8 problems are available on the ZIML site by clicking here (either as a Mock Exam or PDF). While you’re there, check out the Daily Magic Spells and Monthly Contests for extra practice!

The AMC 8 exam is administered by the Mathematical Association of America (MAA). For general information about the AMC 8, click here.