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Digital SAT · Math

Section 2, Module 1

24:18
Question 10Mark for review

The function f is defined by f(x) = 2x² − 12x + 13. What is the minimum value of f(x)?

A−5
B3
C5
D13

Example answer selected. Try the live question below to choose your own answer.

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Composed from our SAT test, answer-review and practice-builder interfaces. Sample question and example state; no student result is shown.

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10 questions

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GMAT · Quantitative Reasoning27:40
9

On this screen

  • Choose your section order
  • Section timer and optional break
  • Bookmarking, with a review screen at the end of each section where you can change up to three answers
  • On-screen calculator in Data Insights
PreviewQuestion 9 of 20
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GMAT sample interface: illustrative timer, position and navigator; no question shown. Tools and formats vary by exam.

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    Section and module timers help you experience a complete timed sitting.

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    On the GMAT: choose your section order; section timer and optional break. In SAT Math: Desmos, the reference sheet, answer elimination and mark for review.

  • Practise the right structure

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This sample uses illustrative data. Estimated scores use our conversion, are not official scores and do not predict your test-day result. Report details vary by exam.

Digital SAT

Practice Test 4 · Score report

Sample report

Estimated total

1420

of 400–1600

Reading and Writing
670
Math
750
Accuracy
82%80/98
Pacing
Needs attention
Weakest topic
Advanced Math

Math skill balance

Sample accuracy by topic. A different shape calls for a different focus.

Math · accuracy by topic

Review testPractise this topic
Your dashboardSample · synthetic data

IELTS · Overall band history

7.0Latest attempt · band estimate of 9
6.06.57.0010203
My mistake types

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Study streak · examplePractice badges
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SATMathMultiple choice
The function f is defined by f(x) = 2x² − 12x + 13. What is the minimum value of f(x)?

Your explanation appears here

After you answer, you will see whether you were right, why the correct option is correct, why each of the others is wrong, and a method you can reuse. Every question in the question bank comes with a worked explanation of its solution.

Topic
Advanced Math
Question type
Multiple choice

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Works on SAT, GMAT, GRE, PTE, IELTS, TOEFL, ACT, AP and TR-YOS practice tests.

Sample screen · AI Tutor lesson flow: results page, choosing a question, working it on the board (silent video with captions)
  1. 1

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  2. 2

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  3. 3

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  4. 4

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Before you start.

What is the difference between a practice test and a question bank?

A practice test is a full-length, timed sitting in the structure of the real exam. It tells you where you stand and ends in an exam-specific score report and a review of every question. A question bank is for targeted practice: you choose a section, topic, skill and difficulty, answer a set of questions, then review every answer with its worked explanation. Most students use the test to find weak areas and the bank to fix them.

Which exams can I practise for?

Digital SAT, ACT, TR-YOS, 31 AP subjects, GRE General Test, GMAT Exam, Law School Admission Test, IELTS Academic, TOEFL iBT and PTE Academic. Full-length practice tests are available for the Digital SAT, ACT, TR-YOS, 31 AP subjects, GRE General Test, GMAT Exam, Law School Admission Test, IELTS Academic, TOEFL iBT and PTE Academic, and question banks for the Digital SAT, ACT, TR-YOS, 2 AP subjects, GRE General Test, GMAT Exam, IELTS Academic, TOEFL iBT and PTE Academic. Published tests open after payment; packs can also include tests sold before publication, with access starting when those tests open.

Is anything free?

Yes. The Digital SAT, ACT, TR-YOS, 21 AP subjects, GRE General Test, GMAT Exam, Law School Admission Test, IELTS Academic, TOEFL iBT and PTE Academic each have one free full-length practice test. A fixed free sample, the same questions for everyone: 30 in the SAT bank, 30 in the ACT bank, 30 in the TR-YOS bank, 30 in the GRE bank, 30 in the GMAT bank, 30 in the IELTS bank, 30 in the TOEFL bank, 30 in the PTE bank and 20 in each AP bank. The sample questions on this site are free without an account.

How long does access last?

Published practice tests you buy stay available on your account for 12 months from the date of purchase. Tests sold before publication open automatically once enough new tests are published to fill the remainder of your pack; their 12 months of access start on the day they open. Nothing renews and nothing is charged again. Question-bank access lasts 120 days (240 days for an AP subject's bank) from the day it opens. SAT, GRE, GMAT, PTE and the AP banks open after payment. ACT, IELTS, TOEFL and TR-YOS plans open when every section they cover has questions, straight away if they do now. It is a fixed window, not a subscription: it does not renew and you are never charged again automatically.

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Are the practice tests adaptive?

Adaptivity depends on the exam. Your exam’s practice-test page explains its section structure, timing and adaptive routing. These are independent practice tests, not official exam software.

How many questions are in the question banks?

SAT: 9,000; ACT: 7,500; TR-YOS: 3,123; AP Chemistry: 8,294; AP Physics 1: 8,001; GRE: 20,314; GMAT: 11,271; IELTS: 7,890; TOEFL: 2,980; PTE: 6,605. The counts are read from the live question database and include only questions that are available to practise.

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Practice tests, question banks and AI Tutor time are digital content. You can ask for a refund of a digital product you have not used within 14 days of the payment date. A product counts as used once any practice test in the pack has been started, any question in a paid section of the question bank has been opened, or any second of AI Tutor time has been used; a used product is not refunded. If you are charged twice by mistake, contact us and the duplicate charge is refunded.

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