Free
$0no card needed
- The Daily, every day
- 36 practice questions a day, each with an explanation: 12 easy, 12 medium, 12 hard
- Full-length Test A and Challenge Test 1
- All 1,023 vocabulary words: browse, flashcards and quiz
Digital SAT practice
Reach your peak.
A quick run every day, an explanation for every question, and full-length tests on official timing.
Free, no card. You also get 36 practice questions a day: 12 easy, 12 medium and 12 hard.
The DailySTEP 1
- Three hearts. A miss costs one.
- Streaks pay. ×2 from three in a row, ×3 from six.
- Your longest streak. Beat it tomorrow.
Full-length tests
The real test, rehearsed.
98 questions across four modules, in the digital SAT’s order and on its timing, with a highlighter, a question map and a timer you can see.
How it works
One run a day. One skill at a time.
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1
Play the Daily.
A quick run with three hearts. String right answers together and the questions get harder and the points multiply.
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2
Miss one, learn why.
Every question is tagged by domain and skill, and every answer comes with an explanation.
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3
Drill that skill.
Practice any single skill at any difficulty, or just the questions you got wrong.
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4
Beat your best.
Come back tomorrow and climb. Progress shows your accuracy and your strongest skills.
Built around the real SAT blueprint.
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.
Free daily practice
12 easy, 12 medium and 12 hard questions free every day, each with a full explanation. Filter by section, domain, skill and difficulty. Resets at midnight.
Real SAT timing
Take any test on official timing, extended 1.5× time, or untimed to focus purely on accuracy.
Adaptive full-length tests
Four modules in official order. The second module of each section adapts to how you did on the first.
Vocabulary
1,023 essential SAT words. Browse the list, flip flashcards, or quiz yourself.
Your progress
Accuracy across daily practice and full tests, your strongest skills, and the ones that need the most help.
Games
PEAK Survivor, Hole and Peak Defense: three games powered by SAT practice questions.
Explanations
Every answer, explained.
Not just the right letter: how to get there, and why the tempting answer is wrong.
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.
Test day
What test day looks like.
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
Peakscor by the numbers
- 36free practice questions every day
- 98questions in every full-length test
- 1,023SAT vocabulary words
- 1.5×extended-time option on every test
Plans
Free every day. Pro when you’re serious.
The free plan is the real thing, not a trial. Pro removes the limits. Peak adds the full course and a plan to test day.
Pro
$20a month, or $200 a year
- Everything in Free
- Unlimited practice, no daily limit
- Every full-length test and Challenge test
Peak
$29a month, or $280 a year
- Everything in Pro
- The full Learn course: every lesson and mastery quiz
- Peak Plan, day by day to test day
Prices in US dollars. Cancel anytime.
FAQ
Questions, answered.
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.
Free, no card.
Percentages · Lesson 1
Percent of a quantity
Percent means per hundred. 35% means 35 out of every 100, so 35% is , or 0.35. To turn a percent into a decimal, divide by 100: move the decimal point two places to the left.
Most percent questions come down to one equation: part = (percent as a decimal) × whole. In a word problem, of usually means multiply and is means equals. The whole is the amount the percent is of.
Find the part. What is 35% of 140? .
Find the whole. 24 is 75% of what number? , so . The whole is bigger than the part whenever the percent is under 100%.
Find the percent. 18 is what percent of 225? Divide the part by the whole: , which is 8%.
When a percent describes part of a group that is itself a percent of something larger, take one percent at a time, each of its own whole.
Worked example Easy
If 18% of a number is 36, what is the number?
- Answer
How to solve it
- Write 18% as a decimal: 0.18. Call the number . 18% of a number is 36 becomes .
- Divide both sides by 0.18: .
- Check: . The number is bigger than 36, as it must be, because 36 is only 18% of it.
Why each choice is right or wrong
- A. Incorrect. This finds 18% of 36: . But 36 is the part, not the whole. The number you want is larger than 36.
- B. Incorrect. This writes 18% as 1.8, moving the decimal point only one place, so . 18% is 0.18.
- C. Correct. , so . Check: 18% of 200 is 36.
- D. Incorrect. This writes 18% as 0.018, moving the decimal point three places, so . 18% is 0.18.
Worked example Medium
A school has 600 students. Of these students, 45% take a language class, and 20% of the students who take a language class study Mandarin.
How many students at the school study Mandarin?
- Answer
How to solve it
- The 45% is of the whole school: students take a language class.
- The 20% is of the language students, not of the school: .
- In one step: , so 9% of the school studies Mandarin, and .
Why each choice is right or wrong
- A. Correct. 45% of 600 is 270 language students, and 20% of those 270 is 54.
- B. Incorrect. This takes 20% of the whole school, . The 20% is of the students who take a language class.
- C. Incorrect. 270 is the number of students who take a language class. The question asks how many of them study Mandarin, so take 20% of 270.
- D. Incorrect. This adds the percents, , and takes 65% of 600 to get 390. The two percents have different wholes, so they can't be added.
Trap Moving the decimal point the wrong number of places
A percent becomes a decimal when you divide by 100: 4% is 0.04, 40% is 0.4, and 0.4% is 0.004. Writing 0.4% as 0.4 makes an answer off by a factor of 100: too big when you multiply by the percent, too small when you divide by it. A choice built from a one-place or three-place slip can appear among the options, so count the places.
Trap Using the wrong whole
In the Mandarin example, 20% is a percent of the language students, not of the whole school. Before you multiply, ask: percent of what? Two percents with different wholes can't be added.
Desmos When Desmos isn’t faster
These are one- or two-step calculations, and the real work is deciding which number is the part and which is the whole. Desmos can't make that choice for you.
Desmos can still do the arithmetic. Type 27/0.18 on a line and it shows 150. If you'd rather not rearrange the equation, graph and , zoom out until you see where they cross, and click the intersection, . Its -coordinate is the whole.
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.
Free every day. Pro when you're serious.
Practice free every day. Pro removes the limits. Peak adds the full course and a plan to test day.
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- ✓ Explanations on every question
- ✓ Test A and Challenge Test 1
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PRO
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Full course and plan
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$280/ year
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- ✓ Everything in Pro
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