A common word problem in Japan. It says that "In January, there is a pair of mice. They copulate and bear twelve children. The next month, 7 pairs of mice copulate and bear twelve children respectively. How many mice are there in December?"

escape

to escape, to flee, to run away

verbal arithmetic

(geology) active volcano

beginner / (Internet slang) noob; newfag

gold mine (mine for gold)

(arithmetic) addition

(cooking) silver dragée

(less common) Alternative form of 白頭山 (Pekutusan, “Paektu Mountain (a mountain on the border between North Korea and China)”)