MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 127
The first user who solved this task is Brian Macpherson.
#brainteasers #math #riddles
Zinc extractionIn 1857, a U.S. patent (#16,362), which was the country's first patent related to zinc ore was issued to Samuel Wetherill, Bethlehem, Pa. |