问几道prep的题，谢谢~

duluchen

1.A certain city with a population of 132,000 is to be divided into 11 voting districts, and no district is to have a population that is more than 10 percent greater than the population of any other district. What is the minimum possible population that the least populated district could have?

Answer 11000

2. the table shows the number of shares of each of the 5 stocks owned be Mr. S. if Mr. S was to sell 20 shares of stock X and buy 24 shares of stock Y. What would be the increase in the range of the numbers of shares of the 5 stocks owned by Mr.S?

Answer 15
Stock    Number of shares
V    68
W    112
X    56
Y    94
Z    45

3。Are at least 10 percent of the people in country X who are 65 years old or older employed?
(1) In country X, 11.3 percent of population is 65 years old or older
(2) In country X, of population is 65 years old or older, 20 percent of men and 10 percent of women are employed
Answer B

4. On the number line shown, is zero halfway between r and s?
(1) s is to the right of zero
(2) the distance between t and r is equal to the distance between t and –s

Answer C

希望可以给出解法，谢谢~~~