单选题
单选题
On which day was the difference between the values of stock A and stock B greatest?
【正确答案】
E
【答案解析】The days when the points representing the values of stocks A and B seem furthest apart are Wednesday and Friday. On Wednesday, stock A was worth 35 and stock B was worth 20, a difference of 15. On Friday, stock A was worth 30 and stock B 10, a difference of 20. Thus, the difference was greatest on Friday.
单选题
Over which time period did the value of stock A experience the biggest percentage change?
【正确答案】
A
【答案解析】From Monday to Tuesday, stock A went up 10 points, from a value of 10 to a value of 20. Relative to its initial value of 10, this is an increase of 
= 1=100%. From Tuesday to Wednesday, stock A went up 15 points from 20 to 35, an increase of 
. From Wednesday to Thursday, the stock went down 10 points from a base of 35, a change of 
. From Thursday to Friday, the stock went up 5 points from 25, a change of 
= 1=100%. From Tuesday to Wednesday, stock A went up 15 points from 20 to 35, an increase of . From Wednesday to Thursday, the stock went down 10 points from a base of 35, a change of . From Thursday to Friday, the stock went up 5 points from 25, a change of