Think your brain’s healthy? Prove it:

Think your brain’s healthy? Prove it:

Remember 5 words after 5 minutes.
Focus on 1 task for 10 minutes—no distractions.
Reaction time under 300ms—test it online.
Solve 7 x 13 + 4—fast.
Balance on one leg, eyes closed, 30 seconds.
Pass? You’re sharp. Fail? Time to level up.
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