In which state was gold discovered in 1848, leading to a gold rush?

California

How many squares make up a Sudoku puzzle grid? On what feast day, celebrated on December 28th, do pranksters play tricks on friends and family in some Spanish-speaking countries? What was the name of Harriet Beecher Stowe’s novel that impacted American views on slavery? What was the last major Native American resistance battle in 1890? Which amendment repealed prohibition in America?