[求助] 几道数学题

Henrik

29 Is the inter n odd?

1) n is divisible by 3

2) 2n is divisible by twice as many positive integers as n.

B

 

119.  某个地区in June, its average temperature is 20;in July, its average temperature is 25.求June & July的least average temperature.
A: 5 B:20 C:25 D:30 E:35

JJ 上的题,可能题目不对, 答案是不是应该在 20-25 中间?

 

 

12 During a 10-week summer vacation, was the average (arithmetic mean) number of books that Carolyn read per week greater than the average number of books that J read per week?

1) Twice the average number of books that Carolyn read per week was greater than 5 less than twice the average number of books that Jacob read per week.

2) During the last 5 weeks of the vacation, C read a total of 3 books more than J.

 

E         

条件1 是什么意思?

 

 

 

谢谢了