Rewire your brain. Build better pathways.
Puzzles · Brain exercises · Mindset
Train your neuroplasticity, one challenge at a time. The games from our Instagram reels, now playable on your phone.
Choose what to train
Each group trains one brain skill. Games marked Play are ready now; the rest arrive as our reels go live.
See where your brain is today
Quick checks for focus, memory, speed and mindset. Take one, play for a week, then take it again and compare.
For fun and self-reflection only. These are not medical or psychological assessments.
Find the fake coin in 2 weighings
There are 8 gold coins, A to H. Exactly one is fake, and it is slightly lighter. You have a balance scale, but you may use it only twice. How do you find the fake coin for certain?
- Weigh A, B, C against D, E, F.
- If they balance, the fake is G or H. Weigh G against H; the side that rises is fake.
- If one side rises, the fake is in that group of three. Weigh two of them. The one that rises is fake; if they balance, it is the third.
Your BrainBuzz stats
Saved on this device only.
Questions people ask
Is BrainBuzz free?
Yes. Every game on this site is free to play, with no sign-up.
How long does a game take?
Most rounds take 45 seconds to 2 minutes, so you can play one on a short break.
Where is my score saved?
Your best time and streak are saved in this browser on this device. Clearing your browser data resets them.
When do new games arrive?
Each new game starts as a @brainnbuzzz reel and is added here soon after. The Daily Focus Challenge changes every day at midnight.
What does "rewire your brain" mean?
Neuroplasticity is your brain's ability to form and strengthen connections when you practise something. Regular play makes you faster and sharper at these kinds of tasks. For overall brain health, sleep, exercise and learning new things matter most too.