我是新人，求解GWD1-Ｑ４，Ｑ１１，Ｑ１４

noreen1027

Q4:

If n is the product of the integers from1 to 20 inclusive, what is the greatest integer k for which 2^k is a factor of n?



A.10

B.12

C.15

D.18

Q7:

A circular mat with diameter 20 inches is placed on a square tabletop, each of whose sides is 24 inches long.Which of the following is closest to the fraction of the tabletop covered by the mat?



A.5/12

B.2/5

C.1/2

D.3/4

E.5/6

E.20
Q11:

In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old.If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?



A.3/5

B.2/3

C.3/4

D.4/5

E.5/6





20
Q11:

In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old.If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?



A.3/5

B.2/3

C.3/4

D.4/5

E.5/6

alannesta

第一题把1-20里面有多少个2这个因子数一下就行了
最后一题50%M+40%F=(M+F)42%.求出M,F的比例，再F/M+F结果应该是D

noreen1027

谢谢。。。明白了！