∫π∑√∞θ±≈Δ%∂∇÷∴

For IB Math AA students

An IB Math AA amigo who's been exactly where you are.

Find the subtopics that feel shaky, get the right video and questions next, and walk into your exam ready.

P1Question 1

Number and Algebra HL · Sequences and Series

EasyNo calc

[Maximum mark: 6]

The first three terms of an arithmetic sequence are u 1, 4u 1 - 9 and 4u 1 + 9.

(a) Show that u 1 = 9. [2]

(b) Prove that the sum of the first n terms is a square number. [4]

Number and Algebra notes

Exponents and Logarithms

Not in the formula booklet; practise until confident.

Law 1

x^a·x^b = x^a+b

Law 2

x^a/x^b = x^a−b

Log law

log_a(xy) = log_ax + log_ay

Change base

log_ax = ln x / ln a

Tips and tricks

→ A log is the inverse of an exponent: log_ax = y means a^y = x.

P1Question 1

Number and Algebra HL · Sequences and Series

EasyNo calc

[Maximum mark: 6]

The first three terms of an arithmetic sequence are u 1, 4u 1 - 9 and 4u 1 + 9.

(a) Show that u 1 = 9. [2]

(b) Prove that the sum of the first n terms is a square number. [4]

Number and Algebra notes

Exponents and Logarithms

Not in the formula booklet; practise until confident.

Law 1

x^a·x^b = x^a+b

Law 2

x^a/x^b = x^a−b

Log law

log_a(xy) = log_ax + log_ay

Change base

log_ax = ln x / ln a

Tips and tricks

→ A log is the inverse of an exponent: log_ax = y means a^y = x.

What's inside

The whole AA syllabus, broken down the way it finally clicked for us.

12:04

Video lessons

Full lessons for every subtopic, split into chapters you can jump between.

Easy

Medium

Hard

Sorted by topic, paper and difficulty

Question Bank

Original exam-style questions, filtered by topic, paper and difficulty, each with a mark scheme more detailed than an examiner's.

Notes

Written notes for every lesson, to read along or revise from.

Cheatsheets

Printable, one-page summaries.

Speedrun Lessons

Shorter, summarized videos.

Daily question

One new question every morning.

From students who get the struggle

We were in your seat in May 2025.

We sat AA HL in May 2025, and we made every video, walkthrough and cheatsheet ourselves. We remember exactly which subtopics broke us, which markscheme phrases earned the marks, and what it felt like to open a paper we weren't ready for. An “amigo” is the friend who passes their notes back to the next year; that's us, scaled.

Your current amigos

3 total

Hilary W.
May '25 · 7 Math AA HL
Vishan S.
May '25 · 7 Math AA HL
Jovid A.
May '25 · 7 Math AA HL

∑√πΔ

The syllabus

Five topics. Fifty-seven subtopics.

Scientific Notation
Sequences and Series
Financial Math
Exponents and Logarithms
Proofs
Permutations and Combinations
Binomial Theorem
Partial Fractions
Complex Numbers
Systems of Linear Equations

∫∞≈π

An amigo, for every topic. On us.

Every video, note, question and cheatsheet, free while we're in beta.

Try it free →

Hey, we're students too, and we're still building this.

Tell us what's working and what isn't. It genuinely shapes what we build next.