“Two-thirds of what determines how well we age comes from nongenetic factors - as in, our everyday behaviours,” says psychiatrist Dr Gary Small. In Small’s poll of more than 18,000 people across the country, those with healthier habits - a balanced diet, regular exercise - reported fewer memory complaints. And he has found that when people learn and use memory techniques on top of that, magnetic resonance imaging and positron-emission tomography brain images reveal changed neural circuitry and a measurable boost in memory. Which strategies are best for your brain? Take this quiz to find out.

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