January 2005, 5X, 3X, 700 +

Math: JJ 65、已知F(N)= N (N+1)/2 ,　Ｍ，N 为正整数 问: 是否(-1) ^F(M) > 0 (1) M=4K +1, K 为正整数. (2) (-1) ^F(M＋１) > ０ 我选Ａ too.

If a right triangle has a edge equal to 10, which of the following pairs are possible the other two edge’s length. (I) 6, 8 (II) 15/2, 25/2, (III) 40/3, 50/3 , answer: I, II, III

If X < Y, is X > 0.2 Y?

(1) X is greater than 0.4 of the sum of X and Y

(2) The product of XY is greater than 0.2 of Y

不好意思，就记得这些了。总的感觉MATH是没有想象的那么难。

Verbal: RC: (1) about the economic progress of African American before, during and after civil war, presented two debating sides and pointed out both of them ignored the property ownership change during those period. (2) JJ: about the extinction of the bacteria and why some of them are potential to extinct.

(3) (4) forgot

SC: Within the atmosphere, deep clouds containing …. completely cover the planet and protect from Sun reaching ….