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?"

revision, correction, looking over / Short for 点竄術.

demote and exile

revision, correction, looking over

to look over, to revise

Yangsan (a city in South Gyeongsang, South Korea, Asia)

Short for サービス残業 (sābisu zangyō).

verbal arithmetic

(arithmetic) addition

(cooking) silver dragée