Look up a question and press a button to select an answer; the display tells whether it's right, and keeps count
of the score in a two-player competition!
The instrument then keeps count
of each colony that meets this size requirement, which can be as small as 0.1mm.
Indeed, while nobody really keeps count
, the government estimates at least 32 people have died and 3,500 others have needed treatment for overdoses since 1990.