6、If x and y are integers and xy0, what is the remainder when x is divided by y?
when x is divided by 2y, the remainder is 4;
when x+y is divided by y, the remainder is 4;
【答案】B
【思路】X=2YK+4 举反例:当Y=4,X=4时,X/Y的余数为0。当Y=3,X=10时,X/Y的余数为1. X+Y=YK+4 则X=Y+4, 所以X/Y的余数为4
7、One set of numbers consists of consecutive integers and the least number is 3. How many numbers are there in the set?
The average of all the numbers in the set is 6;
The number of integers is one more than the range of the set.
【答案】A
【思路】设最大的数为X, 则共有个数字, 利用求和公式, /=6, 则X=9, 所以这个集合共有7个数字. The number of integers为, one more than the range of the set为, 两边一样的,无法求出X.
8、1010的table里每个格里只能放-100, 0, 100这3个数中的一个,问sum of the table entries0?
每一行只有一个是正数;
每一列只有一个是正数;
【答案】E
【思路】无论是或, 还是+,都无法确定整个表格的和,因为在每个格中都放0,或100或-100或每一行只有一个是正数100,其他还是可以随便放,可都放0或-100,结果就不同,前者和大于0,后者和小于0.同样地条件一和二都无法确定和的正负情况.
9、If n=p/q,and both of p and q are non-zero integers, is n an integer? 分页标题#e#
n^2 is an integer;
n^3 is an integer;
【答案】D
【思路】主要考虑到这样的数字,如:通过条件一N可能为根号2, 可是根号2是无限不循环小数,是无法用分数表示的.只有循环小数和分数都是有理数,可以互相转化.
10、|a-b||a+b|?
ab
a
【答案】A
【思路】知A与B是异号,可得|a-b||a+b|
下一篇: GMAT数学术语代数部分之数论
体坛英语资讯:Trophy for top scorers at inaugural UEFA Nations League Finals embraces Chinese elements
对于大学生活你最怀念的是什么?来看看网友的真实想法
体坛英语资讯:Surfing icon Kelly Slater lives up to legendary status in Australia
国内英语资讯:China motivates universities to promote rural vitalization
国内英语资讯:Chinese vice president stresses development, opening-up of border areas
2019年6月英语四级作文答案:试卷二农场(新东方)
超重或导致患胰腺癌的风险增加
国内英语资讯:Chinese premier underlines mass entrepreneurship, innovation
2019年6月英语四级作文答案:试卷一养老院
此时此刻比梦想更重要
将环保进行到底 东京奥运会领奖台将由回收塑料垃圾制成
2019年6月英语四级作文答案+解析:希望小学(文都教育)
2019年6月英语四级作文真题:养老院(文都教育)
全球交通拥堵排行榜出炉 北京排第三十位
国内英语资讯:Meetings held at top legislature, State Council, top political advisory body to advance CPC
体坛英语资讯:Hazard: I think its time for goodbye
国际英语资讯:Iraq receives 200 IS militants captured by Kurdish-led forces
国际英语资讯:Spotlight: Israeli smart mobility startups lure global automotive players
离死亡不远的老人有哪些感受?
2019年6月英语四级作文答案:试卷一参观养老院(文都教育)
体坛英语资讯:French Open: Top seeds advance to third round, no Chinese player active in singles
国际英语资讯:Chinese UN envoy urges intl community to respect Burundis ownership over its elections
国内英语资讯:Chinese president arrives in Tajikistan for CICA summit, state visit
国际英语资讯:Ukraine to increase security during snap parliamentary elections
清华这条宣传片火了!家里第一个大学生,意味着什么?
体坛英语资讯:Tokyo Olympics organizers focusing on heatstroke prevention
国内英语资讯:China ready to join India for closer development partnership
国际英语资讯:BoE governor weighs up cost of managed no-deal Brexit against crashing out of EU
体坛英语资讯:Chinas Xu Aili wins Taklimakan Rallys title
国内英语资讯:Chinese premier calls for strengthening development impetus, meeting peoples needs