Cerebrum IQ Reasoning Index

Frequently asked questions

Common questions before taking the free IQ-style test

This page covers the questions people usually ask before starting an online IQ test: how long it takes, whether it is free, what data is collected, and how to interpret the result.

Is this IQ test free?

Yes. The assessment is free to start and free to complete.

Do I need an account?

No account, email, or name is required to launch the session.

How long does the test take?

The live session is timed for about 20 minutes and uses 20 questions.

Is it an official IQ certificate?

No. It is a standardized reasoning estimate rather than a formal clinical instrument.

Why are questions different each time?

Sessions are randomized from the larger item bank to reduce repetition and memorization.

Why is there a sponsor video?

The site is designed as a free ad-supported product, so the result unlock is gated behind one video ad.