Brain training for adults
Mental fitness without the fluorescent gym smell.
A small daily exercise for the reasoning skills that show up in work, decisions, reading, and AI-assisted life.
Featured challenge · Estimation · 3 min
Budget Pivot
A team spends 40% of a 1,200 euro budget on software, then spends half of what remains on research.
How much money remains?
Pick an answer to start the timer. The model comparison appears only after you lock in.
Share this brain trainingWhy it works
Short enough for a daily ritual.
The experience is intentionally compact: one problem, one commitment, one explanation, and one reason to come back tomorrow.
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Categories rotate across different mental skills
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More ways into the same daily challenge.
Try a short daily logic puzzle built for clear reasoning, deduction, and human-first thinking before comparing your answer with AI.
Critical thinkingPractice critical thinking with daily reasoning challenges that help you stay sharp while AI tools keep getting stronger.
Human vs AITake a daily human versus AI challenge and compare your reasoning with model baselines after you solve first.
AI benchmark gamePlay a daily AI benchmark game where humans answer first, then compare results against model baselines.
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