Train Your Brain - Kawashima, Ryuta
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Designed for readers who want to keep their minds sharp and stave off the mental effects of aging, this book presents a 60-day program that consists of daily worksheets of simple mathematical calculations that take less than five minutes to complete.

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Produktbeschreibung
Designed for readers who want to keep their minds sharp and stave off the mental effects of aging, this book presents a 60-day program that consists of daily worksheets of simple mathematical calculations that take less than five minutes to complete.