[请求][问题]og上3个资充题请教!

fernandochangUID: 127816

英文解释看不懂......请指教!
239.If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n?
(1)n is even.                            (2)The cube root of n is an integer
A):B

236.Is |x|=y-z?
(1)x+y=z           (2)x<0
A):C

234.If x is a positive integer and w is a negative integer, what is the value of xw?
(1)xw-1/2              (2)w=-1
A):A

233.If x ≠ -y, is (x-y)/(x+y)>1?
(1)x>0                       (2)y<0
A):E

224.If x is a positive number less than 10, is z greater than the average (arithmetic mean) of x and 10?
(1)On the number line, z is closer to 10 than it to x.             (2)z=5x
A):A

218.If n is a positive integer, is the value of b-a at least twice the value of 3n-2n ?
(1)a=2n+1 and b=3n+1                           (2)n=3
A):A

209.     ---|---|---|---|---|---|---|---|---|---|--->
              0           ↑         ↑
                  X               Y
If the successive tick marks shown on the number line above are equally spaced and if x and y are the numbers designating the end points of intervals as shown, what is the value of y?
(1)x=1/2                   (2)y-x=2/3
A):D

thewind_bellUID: 111681

og（虽然我没做，但听别人说好象不怎么的）都可摘出这么题......实在是难得........

说一下第一题吧：其实就是k（2<k<100)的六次方小于100，当然可以求出k=2！B足够拉...

其他的没看，狒狒从来不喜欢一次让别人问这么多题，他宁愿你每封信问一道.发无数封.........真是变态！