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Every question is tagged by section, domain, skill and difficulty, so you can practice exactly what you need. Full tests run like test day: two Reading & Writing modules, a break, then two Math modules.
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MathProblem-Solving and Data AnalysisHard
A store raises the price of a jacket by 20%. Later, it lowers the new price by 20%. The final price is what percent of the original price?
A80%
B96%Correct
C100%The trap
D104%
Check with $100: $100→then$120→then$96
Turn each change into a multiplier.
Up 20% means × 1.20. Down 20% means × 0.80.
Apply them in order.
1.20 × 0.80 = 0.96
Read the answer.
The final price is 96% of the original. That’s B.
Why not 100%?
The 20% cut is taken from the higher price, so it removes more than the 20% increase added.
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Every Peakscor full test follows this order. In the standard tests, the second module of each section adapts to how you did on the first.
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Reading & Writing · Module 1
27 questions32 min
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Reading & Writing · Module 2
27 questions32 min
Adapts to how you did on Module 1. -
Break
10 min
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Math · Module 1
22 questions35 min
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Math · Module 2
22 questions35 min
Adapts to how you did on Module 1.
98 questions · 2 hr 14 min of testing, plus the break
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The Daily, plus 36 practice questions every day: 12 easy, 12 medium and 12 hard, each with a full explanation. Full-length Test A, Challenge Test 1 and all 1,023 vocabulary words are free too. No card needed.
Pro is $20 a month or $200 a year: unlimited practice with no daily limit, plus every full-length test and Challenge test. Peak is $29 a month or $280 a year: everything in Pro, plus the full Learn course and Peak Plan. Cancel anytime from your account.
98 questions across four modules, in the digital SAT’s order: Reading & Writing Module 1 and Module 2 (27 questions each), a 10-minute break, then Math Module 1 and Module 2 (22 questions each). On official timing that’s 2 hr 14 min of testing. You get estimated section scores and a total at the end.
Yes. In the standard full-length tests, Module 2 of each section is the harder version if you get 60% or more of Module 1 right, and the easier version if you don’t. Challenge tests use the hardest material throughout.
Official timing, extended 1.5× time, or untimed, on every test, including the free ones. Extended time allows 48 minutes for each Reading & Writing module and about 52 for each Math module. Untimed removes the clock so you can focus on accuracy.
A quick run with three hearts. Each right answer builds your streak: the questions get harder as it grows, and your points multiply (×2 from three in a row, ×3 from six). A miss costs a heart and drops you back to easy. Best is your longest streak.
Every day at midnight. You get a fresh 12 easy, 12 medium and 12 hard.
No. Peakscor is an independent SAT practice tool, not affiliated with the College Board. Scores shown are estimates.
Your next point starts today.
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Command of Evidence (Quantitative) · Lesson 1
Start with the claim
In a Command of Evidence (Quantitative) question, a short text makes a point and a table or graph holds the data. The question asks which choice most effectively uses data to support a claim, illustrate it or complete an example. Your job is to match the data to one point, not to analyze the whole data set.
Start with the claim, not the numbers. It is often the last sentence, or the sentence that ends in a blank. Turn it into a short checklist: what is measured, which group, place or year, and what relationship the claim states (more, fewer, rose, fell, the most).
Then give each choice two tests. First, is it accurate: do its numbers match the table or graph? Second, is it on target: does it show exactly what your checklist asks for? Many wrong choices pass the first test and fail the second. They describe the data correctly but talk about the wrong group, the wrong year or the wrong comparison.
You don't need to study every number before you look at the choices. Find the row, bar or line the claim names, and look there first.
| Claim says | The right choice must show |
|---|---|
| more than, higher, fewer | values for both things being compared, with the difference going the way the claim says |
| rose, increased, fell | the same group at two or more times, changing in that direction (as values or as the size of the change) |
| the most, the highest, peaked | one value that is larger than every other value it is compared with, either by listing the others or by stating that it is the highest |
| every, each, all | the pattern holding for every group or time the claim covers (if the question asks only for an example, one case that fits is enough) |
| not every, not always | at least one case where the pattern fails |
Worked example Easy
Average Insect Visits per Flower on Three Squash Varieties
| Squash variety | Bee visits per flower | Beetle visits per flower |
|---|---|---|
| Golden Crook | 14 | 3 |
| Tatume | 9 | 6 |
| Blue Hubbard | 11 | 2 |
Agronomist Lucía Ferraz counted insect visits to the flowers of three squash varieties grown in the same field. She found that on every variety, bees visited the flowers more often than beetles did. For example,
Which choice most effectively uses data from the table to complete the example?
- Tatume flowers received an average of 6 beetle visits, compared with 2 for Blue Hubbard flowers.
- Blue Hubbard flowers received an average of 11 bee visits, compared with 9 for Tatume flowers.
- Golden Crook flowers received an average of 14 bee visits and 3 beetle visits.Answer
- Golden Crook flowers received an average of 3 bee visits and 14 beetle visits.
How to solve it
- The claim: on every variety, bees visited more often than beetles. An example needs one variety whose bee number is higher than its beetle number.
- Checklist: one variety, both columns, bees higher. Each row is one variety, so the answer reads across a single row.
- Golden Crook's row shows 14 bee visits and 3 beetle visits. Choice C reports both numbers from that row correctly.
Why each choice is right or wrong
- A. Incorrect. The numbers are accurate (6 and 2 in the Beetle visits column), but this compares beetles on two varieties. The claim compares bees with beetles on the same variety.
- B. Incorrect. The numbers are accurate (11 and 9 in the Bee visits column), but this compares bees on two varieties. It never mentions beetles, so it can't show bees visiting more often than beetles.
- C. Correct. Golden Crook's row shows 14 bee visits and 3 beetle visits per flower, so on this variety bees visited more often than beetles. That is one example of the claim.
- D. Incorrect. This swaps the columns: Golden Crook had 14 bee visits and 3 beetle visits. As written, it would show beetles visiting more often, the opposite of the claim.
Worked example Medium
Plant biologist Hana Sato grew two pea varieties, Alder and Halden, under three light conditions and counted the seeds in each pod. Many gardeners assume that more sunlight always produces more seeds per pod. Sato's results show that this assumption does not hold for every variety:
Which choice most effectively uses data from the graph to complete the statement?
- Halden plants averaged 7 seeds per pod in part shade but only 5 in full sun.Answer
- Alder plants averaged 8 seeds per pod in full sun and 6 in part shade.
- Alder plants averaged more seeds per pod than Halden plants did both in full sun and in full shade.
- Halden plants averaged 3 seeds per pod in full shade, fewer than in either of the other conditions.
How to solve it
- The claim is that the gardeners' assumption, more sunlight, more seeds, fails for at least one variety.
- So you need one variety for which a sunnier condition produced fewer seeds per pod than a shadier one.
- Halden: 5 seeds in full sun, 7 in part shade. The sunnier condition produced fewer seeds, which is choice A. Choices B and D are accurate but fit the assumption, and choice C compares the two varieties instead of the light conditions.
Why each choice is right or wrong
- A. Correct. For Halden, full sun (5 seeds per pod) produced fewer seeds than part shade (7), so more sunlight did not mean more seeds for this variety.
- B. Incorrect. The numbers are accurate, but Alder produced more seeds in full sun (8) than in part shade (6). That fits the gardeners' assumption instead of showing where it fails.
- C. Incorrect. Alder did beat Halden in full sun (8 to 5) and in full shade (4 to 3), but this compares the two varieties. It says nothing about whether more sunlight produced more seeds.
- D. Incorrect. The numbers are accurate, but Halden's lowest count coming in full shade, the darkest condition, fits the assumption. It doesn't show the assumption failing.
Trap Accurate but off target
One of the most tempting wrong answers reads the data correctly and still misses. It reports real numbers about a different group, a different year or a different comparison than the claim names. Before you choose, ask: is this exactly what the claim needs?
Trap The right comparison for the wrong group or year
When the data cover several groups or years, a wrong choice often makes the same kind of comparison the claim makes, but for a neighboring row, the other bar color or a different stretch of time. Mark the group and the time in the claim, and check that the choice uses exactly those.
Practice
Choose a section, then practice a whole domain or drill a single skill.
Full-length tests
Each test mirrors the digital SAT: 98 questions across four modules, 2 hr 14 min on official timing.
A little harder than the real SAT. These tests can run slightly tougher than test day, which makes them good practice: if you can handle these, the real one should feel easier. No question appears in more than one test, Challenge Tests included.
Challenge Tests Hardest of the hardest
Same 98-question format, but every question is drawn from the toughest SAT material: Challenging-tier math throughout and the hardest reading.
Vocab
Study the classic SAT vocabulary list. Browse, flip flashcards, or quiz yourself.
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