Numberdale practice · Ages 11 to 14 · Grades 6 to 8
AMC 8 Prep
Practice for students going for the top scores on the AMC 8. Fresh contest-style problems in every area of the test, each with a worked solution, and the next one pitched at the student's level.
AMC is a trademark of the MAA. Not affiliated with the MAA.
How it works
Practice the way the contest asks.
Every problem is made fresh by a generator in the style of the AMC 8: five choices, a drawn figure where it needs one, and a worked solution after.
-
A fresh problem at their level.
Each topic has its own level, and the next problem is pitched at it: hard enough to learn from, usually solvable. Before answering, a hint gives the key idea (it counts half).
-
A worked solution, and the miss comes back.
After each answer: the key idea and the solution, step by step. A missed problem comes back as a similar problem, then as reviews 1, 3 and 7 days later.
-
Every area of the contest.
24 topics across the AMC 8's areas, from angle chasing to probability. A 12-problem placement check sets the starting point, a timed 12-minute sprint practices contest pace, and 40-minute practice tests are laid out like a real paper.
-
Real past papers, scored.
An answer sheet for all 26 real AMC 8s since 2000. The problems open on the AoPS wiki; the sheet scores itself, compares with that year's top 5% and top 1% cutoffs, and turns the misses into practice. A report shows where the points are lost.
What it covers
Every area of the AMC 8.
24 topics in eight areas, with each area's usual share of the 25 problems on recent papers. Every problem template is checked: its answer is confirmed a second, independent way on hundreds of instances, and reviewers solved the problems blind.
-
Geometry
About 6 of 25 problems
- Pythagorean theorem
- Special right triangles
- Angle chasing
- Polygon angles
- Shaded areas
- Similar triangles
- Triangle area ratios
- Coordinates & lattice
- Circles
- 3-D solids
- Nets, folding & symmetry
- Counting shapes & tilings
-
Arithmetic
About 4 of 25, most in #1–10
- Fractions & percents
- Clever computation
-
Counting & probability
About 3–4 of 25
- Counting
- Probability
-
Number theory
About 2–3 of 25
- Factors, divisibility, GCD and LCM, remainders, units digits
-
Algebra
About 2–3 of 25
- Sequences
- Equations & word problems
-
Ratios & rates
About 2 of 25
- Ratios, speed, distance and time
-
Statistics
About 2 of 25
- Mean, median & mode
- Reading charts
-
Logic & patterns
About 2 of 25
- Patterns & strategy
- Logic puzzles
For parents and coaches
Where the points go
The report shows, topic by topic, how often the student solves the hard problems, and why points are lost: didn't know how, a careless slip, or ran out of time. Progress stays on the device: the name the student types, their answers, levels, reviews and past-paper scores are saved in that browser. With the optional Numberdale family account (the same one as the games), it also syncs across devices and shows on the parents' page.
-
No ads.
Not in the practice, not on this page.
-
Progress stays on the device, or syncs with the family account.
Answers and scores are saved in the browser. We receive only anonymous counts, and the problem reports a student chooses to send.
-
Every problem type checked.
Each answer is confirmed a second, independent way on hundreds of instances, and reviewers solved the problems blind.
FAQ
Questions about AMC 8 Prep
Is it official?
No. AMC 8 Prep is made by Numberdale and is not affiliated with or endorsed by the MAA, which runs the AMC 8. AMC is a trademark of the MAA. The practice problems are generated in the style of the contest, not copied from it; the real past papers open on the AoPS wiki.
Who is it for?
Students in grades 6 to 8 who are going for a top score: the top 5% or the top 1%. The home screen follows how often they would solve a hard problem (#19 to 25) in each area of the test.
How are the problems checked?
Before a problem template goes in, its answer is confirmed a second, independent way on hundreds of generated problems, and reviewers solved the problems blind. Under every solution, "Report a problem with this question" sends us that exact problem.
Where is progress saved?
On the device, in the browser. A grown-up can also turn on the optional Numberdale family account (the same one as the games): progress then syncs across devices and the parents' page shows it. Without an account, the report has a progress code to copy to another browser.
Does it work on a phone?
Yes, on a phone, a tablet or a computer. A full past paper is best worked on paper, with the answer sheet open beside it.
Games
Numberdale's games
Math games for ages 7 to 13, for younger brothers and sisters, or a change of pace.
