GMAT数学练习题及答案【7】

2022-06-06 13:18:38

  

  For the past n days, the average (arithmetic mean) daily production at a company was 50 units. Iftoday's production of 90 units raises the average to 55 units per day, what is the value of n ?

  (A) 30

  (B) 18

  (C) 10

  (D) 9

  (E) 7

  答案:E

  If a two-digit positive integer has its digits reversed, the resulting integer differs from the original by 27.By how much do the two digits differ?

  (A) 3

  (B) 4

  (C) 5

  (D) 6

  (E) 7

  答案:A

  

  答案:E

  GMAT数学相关练习:

  >>

  >>

  >>

  >>

  >>

  >>

  >> 

  >>

  >>

  >>

热门院校