It might seem like a small thing... but it’s not.
Significant Figures
Have you thought about this?
90% of the Questions

In 90% of the questions across both IB exam papers, you’ll be asked to express your answers using three significant figures.

If you don’t do it correctly, you lose one point per question.

That simple.

That serious.

Think about all the work you’ve already done. The hours of study. The practice. The review sessions.
Are you really going to let all of that be affected by poor rounding?

Do one more calculation:

How many points could you lose in total if you mess this up on every question?
Maybe enough to drop a grade. Or miss out on that 6… or even that 7.

But if you’ve got this under control, then there’s nothing to worry about.

And if you’re not totally sure… maybe now’s the time to lock it in. Just maybe.

If not, feel free to close this page and move on.

Your decision.

Your points.

What you will learn here?
Let's transform a number to its most significant digits
In IB exams, final answers must be given to three significant figures unless stated otherwise.

Learn through quick videos, summary notes, and our self-correcting practice tests!
It’s right down here.

No excuses — this is a must-know skill! Time to master it and show what you’ve got!
Theory in less than 10 minutes
How significant figures are calculated?
Hit play and check out the most common cases in this video in under 10 minutes! Learn fast, no stress... and in style!
Quick Guide
Your go-to guide — simple, clear, and stress-free

When working with data or solving problems in IB exams, expressing your final answers using the correct number of significant figures is essential.

Here’s a simple step-by-step method to help you master rounding to three significant figures:

Practice
Self Assessment
It’s your turn! 🧠✨
Put your knowledge to the test with quick, self-correcting exercises.

You'll only have 6 seconds to answer each question. You have to be quick!

Each challenge will sharpen your aim with significant figures. Let’s go — the IB won’t wait!