MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 990
The first user who solved this task is Snezana Milanovic.
#brainteasers #math #riddles
E-LampIn 1992, the E-Lamp, an electronic electrodeless 20-year lightbulb, was announced by Pierre Villere. The E-Lamp is illuminated when radio waves excite a phosphor coating, an efficient process that can save as much as 75% of lighting costs. The E-lamp technology was licensed from Diablo Research Corporation that developed it in the late 1980s. However, they were not approved for residential use in the U.S. In Apr 1994, General Electric (G.E.) Lighting announced that "the world's first practical compact high-tech induction reflector lamp" would be on the market in Europe within weeks using the tradename Genura. It is smaller than the incandescent reflector lamp it replaces. |