题目

1.If the average (arithmetic mean) of 3,8,and w is greater than or equal to 7 and less than or equal to 44,what is the greatest possible value of w
A.11
B.21
C.55
D.121
E.132
Answer:
2.Can a certain rectangular sheet of glass be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop?
(1) The tabletop is 36 inches wide by 60 inches long.
(2) The area of one side of the sheet of glass is 2,400 square inches.
A.Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
B.Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
C.BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT sufficient.
Answer:
3.If the product of the digits of the two-digit positive integer n is 2,what is the value of n
(1) n

提问时间：2020-11-11

答案

我翻译一下吧,你看了应该就会做了.
1、如果3,8和w的算术平均值大于或等于7,而且小于或等于44,那么w的最大可能值是多少?
44*3 - 3 - 8 = 121
2、一个矩形的玻璃板是否能够完全覆盖一个矩形的桌面,而且玻璃板的边和桌面的边是平行的?
(1)桌面36英寸宽,60英寸长.
(2)玻璃板面积是2400平方英寸.
选E,两个条件相加也不充分.比如玻璃板是20*120.
3、n是一个两位的正整数,如果组成n的这两个数字（比如n是14,则这两个数字是1和4）的乘积是2,n是多少?
(1) n 是奇数
(2) n 比20大.
选D,两个都单独充分.因为乘积是2,所以n不是12就是21.(1)单独即可保证n只能是21,(2)单独即可保证n是21.
4、有n个学生,m个教室.如果 3