(1)r+s=t (2)20<=t<=24
这个我选的B,除了20我觉得其它都不满足条件
2.2^26除以6的reminder
3.p is a positive integer. how many different factors does p have
(1)p/5 is a integer
(2)p has two prime factors
4.5^7+5^10有多少个不同的质因子?
5.x(x+y)=0 x=?
(1)x=4 (2)x+y=0
6.[z]is the greatest integer less than z. [z]=-1, z的范围
题目给的范围要比我们求的大,到时候只要选在其中的就行,选项我不记得了
7.a circle x^2+y^2=10,求在圆上有多少个整数点
8.r/s=?
(1)r.s is in a line 经过(0,0)(2,4)
(2)r. s is in a line 过()()
后面两个点具体数值不记得了,但是没有一个点是原点,我做的时候忘了求直线方程看它是不是过原点了
9.一个公司购买个什么东西吧,成本是3美元的加工费再加上买产品的钱,单个产品价钱19.95,问产品的数量是多少?
(1)220<total cost<225
(2)<total cost<
后面一个不太记得了,反正两个数减3了再除那个单价的话一个是十点几,一个是九点几吧.
10.a group, 44% are males,75% are athletes, 15%femal are not athletes. what is the percent of males who are athletes
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