
视频解析
暂无视频解析,点击获取更多视频内容
文字解析
2^k的尾数
条件一 k可以被10整除 所以 2^k的尾数有可能是4,也有可能是6,也就是余数可能为4或6 不确定,不充分
条件二 k可以被4整除 所以2^k的尾数一定是6,也就是除以10后的余数一定为6.充分 所以选B

GMAT会员
- 【OG18-P680-668题】In a review of 2,000 studies of human behavior that date back to the 1940s, two Swiss psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size, none could be taken seriously.
- 【OG18-P680-671题】Manufacturers rate batteries in watt-hours; if they rate the watt-hour higher, the longer the battery can be expected to last.
- The passage provides information to support which of the following statement about La Nina?
- The author of the passage would most likely agree with which of the following statements about the link between increased solar activity and certain seasonal weather changes on the Earth?
- Following several years of declining advertising sales, the Greenville Times reorganized its advertising sales force two years ago. Before the reorganization, the sales force was organized geographically, with some sales representatives concentrating on city-center businesses and others concentrating on different outlying regions. The reorganization attempted to increase the sales representatives’ knowledge of clients’ businesses by having each sales representative deal with only one type of industry or of retailing. After the reorganization, advertising sales increased.In assessing whether the improvement in advertising sales can properly be attributed to the reorganization, it would be helpful to find out each of the following EXCEPT:

添加官方小助手微信
了解更多GMAT考试与咨询