What is the missing number?
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 95
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Carborundum furnaceIn 1896, Edward G. Acheson was issued a U.S. patent for an electric furnace used to produce carborundum (silicon carbide), one of the hardest industrial substances (No. 560,291). The furnace used an electric current passed through a core of carbon rods to produce a strong heating effect resulting from their resistance.« |