But when the quantity of numbers per group increased to the point where mental calculations were no longer possible (e.g. up to 48 numbers), the accuracy rate grew to about 90 percent.

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The quantity of processing power or storage capacity you get per device and per dollar still doubles every few years.

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As in football, these challenges should be limited in quantity (at least by the managers) to, say, 2-3 per game.

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In terms of pure quantity, Chinese women over 65 years old drank the fewest sugar-sweetened drinks (less than one per day), while Cuban men younger than 45 years old drank the most sugary drinks, at over five per day.

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