摘要：
Dividing Description Marsha and Bill own a collection of marbles. They want to split the collection among themselves so that both receive an equal sha 阅读全文
摘要：
Counterfeit Dollar Description Sally Jones has a dozen Voyageur silver dollars. However, only eleven of the coins are true silver dollars; one coin is 阅读全文
摘要：
Joseph Description The Joseph's problem is notoriously known. For those who are not familiar with the original problem: from among n people, numbered 阅读全文