Daily Brain Boost

Keep your prefrontal cortex sharp

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Multi-step mental arithmetic is the single best 1-2 minute exercise for working memory and executive function. Do it daily!

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Mental Math

+5 XPStreak

Procedural arithmetic to load working memory

Level 12-digit × 1-digit
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Fermi Estimation

+5 XPOptional

Order-of-magnitude estimation practice

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