ONE
    Númas

    For parents

    What your child will work on here, and how the site teaches.

    This is a free maths practice site for children following the Portuguese national curriculum, the IB programme, or preparing for olympiads. It is practice material and progress tracking — not a course, not a tutor and not a replacement for school.

    There are no grade promises here, and no claims about results. What follows is a plain list of the material that exists and a description of how the exercises behave.

    What is covered

    Every number below is counted from the material itself. A topic appears only when items for it exist. 171 problems · 429 exercises

    National curriculum

    51 problems · 149 exercises

    5–616 problems · 44 exercises

    • Geometry · Geometria3 problems · 13 exercises
    • Numbers & Operations · Números e Operações11 problems · 23 exercises
    • Sequences · Sucessões1 exercise
    • Statistics · Estatística2 problems · 7 exercises

    7–921 problems · 50 exercises

    • Algebra · Álgebra7 problems · 17 exercises
    • Geometry · Geometria8 problems · 16 exercises
    • Numbers & Operations · Números e Operações3 problems · 9 exercises
    • Statistics · Estatística3 problems · 8 exercises

    10–1214 problems · 55 exercises

    • Algebra · Álgebra2 problems · 6 exercises
    • Calculus · Cálculo2 problems · 10 exercises
    • Complex Numbers · Números Complexos1 problem · 6 exercises
    • Functions · Funções3 problems · 8 exercises
    • Geometry · Geometria1 problem · 4 exercises
    • Probability · Probabilidades1 problem · 7 exercises
    • Sequences · Sucessões1 problem · 5 exercises
    • Statistics · Estatística1 problem · 3 exercises
    • Trigonometry · Trigonometria2 problems · 6 exercises

    IB programme

    75 problems · 125 exercises

    5–637 exercises

    • Geometry & Trigonometry · Geometria e Trigonometria7 exercises
    • Number · Números19 exercises
    • Probability · Probabilidade4 exercises
    • Statistics · Estatística7 exercises

    7–925 problems · 38 exercises

    • Algebra · Álgebra6 problems · 10 exercises
    • Geometry & Trigonometry · Geometria e Trigonometria7 problems · 10 exercises
    • Number · Números5 problems · 8 exercises
    • Probability · Probabilidade3 problems · 4 exercises
    • Sequences · Sequências1 problem
    • Statistics · Estatística3 problems · 6 exercises

    10–1250 problems · 50 exercises

    • Algebra · Álgebra2 problems · 2 exercises
    • Calculus · Cálculo15 problems · 14 exercises
    • Functions · Funções8 problems · 9 exercises
    • Geometry & Trigonometry · Geometria e Trigonometria2 problems · 1 exercise
    • Number · Números1 problem · 1 exercise
    • Probability · Probabilidade8 problems · 8 exercises
    • Sequences · Sequências5 problems · 5 exercises
    • Statistics · Estatística4 problems · 4 exercises
    • Vectors · Vetores5 problems · 6 exercises

    Olympiad preparation

    45 problems · 155 exercises

    5–615 problems · 42 exercises

    • Combinatorics · Combinatória4 problems · 10 exercises
    • Geometry · Geometria1 problem · 7 exercises
    • Logic · Lógica1 problem · 8 exercises
    • Number Theory · Teoria dos Números7 problems · 17 exercises
    • Proofs · Demonstrações2 problems

    7–917 problems · 72 exercises

    • Algebra · Álgebra1 problem · 6 exercises
    • Combinatorics · Combinatória5 problems · 23 exercises
    • Geometry · Geometria1 problem · 11 exercises
    • Inequalities · Desigualdades1 problem · 2 exercises
    • Logic · Lógica1 problem · 5 exercises
    • Number Theory · Teoria dos Números4 problems · 23 exercises
    • Proofs · Demonstrações4 problems · 2 exercises

    10–1213 problems · 39 exercises

    • Algebra · Álgebra1 problem · 4 exercises
    • Combinatorics · Combinatória2 problems · 11 exercises
    • Geometry · Geometria1 problem · 6 exercises
    • Inequalities · Desigualdades5 problems · 8 exercises
    • Number Theory · Teoria dos Números4 problems · 10 exercises

    No school year assigned2 exercises

    • Proofs · Demonstrações2 exercises

    How the teaching works

    • Solutions open one step at a time. Your child sees the first step and chooses whether to continue, so a stuck problem can be unstuck without handing over the answer.
    • A wrong answer costs no XP and never subtracts any. Nothing is locked and there is no limit on attempts.
    • After a wrong answer the tried option is greyed out, the remaining options stay live and are reshuffled, and the correct option is only marked green once your child has solved it or has read the explanation to the last step.
    • Every problem has a hint that can be opened before the solution.
    • The Portuguese wording of each problem, exercise and topic name is shown alongside the English one, so your child can match this material to their school lesson.
    • Diagrams are described in words, and any figure that carries data needed for the answer states that data in its description.

    What is recorded

    • For each exercise: whether it has been solved, how many attempts were made and when it was last answered.
    • Daily challenge: which day's challenge was completed and whether it was correct.
    • XP and level, current and longest day streak, and badges earned.
    • Saved favourites.

    None of this is recorded without an account, and each account can only read its own records. Progress can be exported as PDF or CSV from the progress page.

    See the programmesProgress page