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10 real SAT Math questions. 16 minutes. Every mistake explained. No signup.

  • Foundations

    You’re around 500 and the easy ones still slip.

    ~450–600 target score
    10 questions · 16 min · 1,340 took this
    Start
  • Core

    You’re around 600 and stuck there.

    ~550–700 target score
    10 questions · 16 min · 2,105 took this
    Start
  • Challenge

    You’re near 750 and want the last 50.

    680+ target score
    10 questions · 16 min · 880 took this
    Start
Free full exam every weekend

The report is the point

Ten questions get you a taste. The weekend exam gets you a score.

1

After the 10-question sample

right now, no signup
Sample set · CorePractice Report
Premium sample · open to everyone
Free in every full-exam reportPremium Premium report only
Estimated SAT Math range Free560–660Low confidence · no point score from 10 questions
Correct Free7/10Top 22% of 1,340 on this set
01Error patternPremium

Answered with the variable — hit Q4, Q7 and Q10. You solved for x, then gave x when the question asked for something else.

One fix: underline what the question asks for before you start solving.

02Fragile correctPremium
3Problem-Solving & Data Analysis2:35 / 0:50
8Geometry & Trigonometry4:20 / 1:40

Right answers, at more than 2.5× the expected time. These are the ones that break on test day.

Where the points wentFree
Algebra3/3
Advanced Math1/3
Problem-Solving & Data Analysis2/2
Geometry & Trigonometry1/2
Question review

Free question, your answer, correct answerPremium why it was wrong, faster approach, your time

“You chose B (8) — that’s x. The question asked for x + 2.”

A sample of the full Premium report, open to everyone. Pacing and module routing need the full 44 questions.
The full exam gets you a real score
2

After the full Live Exam

free to sit, every weekend
Lumi Live Exam · WeekendScore Report
44 questions · 70 min
Free in every full-exam reportPremium Premium report only
SAT Math score Free640Module 1 · 330 · Module 2 · 310
Correct Free34/4472nd percentile of 2,410 who sat it
Where the points wentFree
Algebra13/14
Advanced Math7/12
Problem-Solving & Data Analysis9/10
Geometry & Trigonometry5/8
Question review · full answer keyFree
QSkillYouAnswerCorrectReport an issue
1Linear equationsBB
2PercentagesCC
7Systems of equationsCA
12QuadraticsBD
19CirclesAA
What stood outFree
  1. 1One type of mistake accounts for nearly half of what you missed.
  2. 26 of your correct answers were slow enough to be at risk on test day.
Premium unlocks which mistake, which questions and the fix
01Error patternPremium

The named mistake, every question it hit, and one fix.

02Fragile correctPremium

Which 6 right answers were at risk, with your time against expected.

03PacingPremium

The question that ate your time, and what it cost — shown only when it happened.

04Question review · why it was wrong, faster approach, your timePremium

“You chose C (14) — that’s x. The question asked for x + 2.”

05Module routingPremium

“Second module: Standard.”

Free tells you what you got wrong. Premium tells you why it keeps happening.

The same screen as test day

Real timer, navigator, eliminator, reference sheet, calculator. Nothing new to learn on the morning that counts.

Section 1 · Math
4:48
Question 1 · Algebra

If 3x + 7 = 22, what is the value of x + 2?

0 of 3 answered
  • Hand-produced and vetted

    Every question is written and reviewed by our network of 1,500+ subject experts before it reaches you.

  • Built to the blueprint

    Domain weighting, difficulty curve and item formats follow the College Board exam blueprints.

  • Calibrated on real results

    Difficulty and score estimates are backed by data from thousands of test takers every week.

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Weekly Live Exam, 44 questions
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Full answer key — every question, your answer, the right answer
What stood out: error pattern and fragile correct
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Which mistake, which questions, the fix
Why your answer was wrong
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The pattern across your misses, with one fix
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Right answers that were at risk
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Your time per question, and what pacing cost you
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Questions

Live Exam or Practice?

The Live Exam is a real exam at a set time, once a week, sat with everyone else. Practice is open whenever, on your own material or a set you pick.

Do I need an account?

Not for the sample sets. Registering for the weekend exam takes an email — nothing else.

Where do the questions come from?

Retired SAT items. A person solves every question before it goes live. We pick items; we never rewrite them.

Can I do it on my phone?

Yes. The real thing is on a laptop or tablet, so use one if you have it.