Otak Encer: IQ & Brain Test

How fluid is your brain today? Otak Encer tests five brain skills with quick challenges modelled on the tasks brain researchers use. About 5 minutes, no account needed.

FIVE CHALLENGES
• Memory – Digit Span: remember ever-longer strings of digits
• Focus – Ink Colour: name the ink colour, not the word (Stroop test)
• Detail – Spot the Odd One: find the one different letter in ever-denser grids
• Spatial – Mental Rotation: flat shapes and 3D cube figures, rotated – same or mirrored?
• Logic – Pattern Matrix: complete increasingly hard 3×3 patterns

NEW: CHALLENGE YOUR FRIENDS
Share your result card on WhatsApp or social media and challenge friends to the exact same questions. Whose brain is more fluid?

DAILY CHALLENGE
A new challenge every day, with the same puzzles for every player. Keep your streak alive!

RESULTS THAT MAKE YOU CURIOUS
• Brain fluidity level: from Still Frozen to Brain on Fire
• Brain fingerprint: a five-point chart that is different for everyone
• See what share of people match you, are below you, and are above you
• Personal bests for every part and comparison with your previous test

FOUR LANGUAGES
English, Español, Português and Bahasa Indonesia.

ALWAYS NEW PUZZLES
Questions are generated fresh every time you play, so they can't be memorised. Great for regular practice or warming up before an aptitude test.

Otak Encer is Indonesian for "fluid brain".

Scores in Otak Encer are estimates for practice and fun, not an official psychological test.
Otak Encer is free and supported by ads. No ads appear while you are answering questions.

Recent changes:
A fresh new look. New: challenge your friends! Share your result card and compete on exactly the same questions. A daily challenge with streaks. Now in English, Spanish, Portuguese and Indonesian. Plus a "More apps from us" menu.