Subjects
Mathematics practice, free.
Algebra, calculus, geometry, statistics and arithmetic from school and entrance exams. Every question has an explanation, and the tests are timed like the real thing.
- 367questions
- 25topics
- 4exams covered
- Freeno plans or paywalls
Mathematics in Brazil
Practise mathematics with the exams you can take in Brazil.
Where do you want to start?
- 132 questions · 9 topicsAlgebraEquations, functions, sequences and the manipulation skills every other topic depends on.Sequences and series · Quadratic equations · Mathematics: Sequences and Functions
- 125 questions · 7 topicsStatistics and probabilityData, averages, counting methods and probability.Statistics and probability · Proportion, Percentages and Statistics · Geometry, Functions and Probability
- 45 questions · 4 topicsGeometry and trigonometryCoordinate geometry, lines and circles, vectors and trigonometry.Geometry and trigonometry · Vectors · Mathematics: Geometry and Measurement
- 40 questions · 3 topicsArithmetic and numberPercentages, ratios, interest, speed and time: the quantitative aptitude toolkit.Percentages and percent change · Ratios, rates and proportions · Mathematics: Percentages and Interest
- 25 questions · 2 topicsCalculusLimits, differentiation and integration, from first principles to exam-style problems.Differentiation · Integration
The most practised topics.
Each topic has its own list of questions with explanations. Pick the exam you are preparing for.
Statistics and probability
34 questions across 2 exams
Sequences and series
23 questions across 1 exam
Proportion, Percentages and Statistics
21 questions across 1 exam
Geometry, Functions and Probability
21 questions across 1 exam
Quadratic equations
20 questions across 2 exams
Geometry and trigonometry
18 questions across 1 exam
Percentages and percent change
18 questions across 1 exam
Mathematics: Sequences and Functions
15 questions across 1 exam
Real questions, worked answers.
- Statistics and probability · SATThe mean of five numbers is 18. Four of the numbers are 24, 13, 13, 21. What is the fifth number?See the answer and explanation →
- Sequences and series · IB DiplomaThe first term of an arithmetic progression is 2 and its common difference is 3. What is the sum of its first 13 terms?See the answer and explanation →
- Proportion, Percentages and Statistics · ENEM BrazilA shirt costs 80 reais (BRL) and is sold with a 25% discount. What is the price paid?See the answer and explanation →
Practise it for real.
Mathematics in your exam.
How to practise mathematics.
- 1
Start with the topic you avoid
The topic you keep skipping is where the quickest marks are. Do one short set on it before anything else.
- 2
Try it before you read the explanation
Struggling for two minutes teaches more than reading a finished solution. Then compare your steps with ours.
- 3
Learn untimed, then add the clock
Get the method right first. Move to a timed mock test once a topic feels steady.
- 4
Keep a list of your mistakes
Write down why each answer was wrong: a sign slip, a formula you forgot, a misread question. The list shows what to fix.
- 5
Come back after a week
Repeat the questions you got wrong after a few days. That is when a method either sticks or fades.
Questions, answered.
- Is the maths practice really free?
- Yes. Every question, explanation, mock test and flashcard deck is free, with no plans or paywalls.
- Which exams does it cover?
- Maths questions from SAT, IB Diploma, FUVEST (University of São Paulo Entrance Exam), ENEM Brazil. There are 367 maths questions on this page's list today.
- Does every question have an explanation?
- Yes. Each question has an explanation with the working or the key idea, and you can open any question on its own page.
- Can I take a timed test?
- Yes. The mock tests below run on a real timer and show a full review with explanations at the end.