1.is x+y is negative? (1) x is negative (2) y is negative ans:E 2.if n is a positive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n? Ans:11 3.if 2^x-2^(x-2)=3(2^13), what is the value of x? Ans:15 4.if v ans w are different integers, does v=0? (1) vw=v^2 (2) w=2 5. if xy>0? (1) x-y > -2 (2) x- 2y<-6 6. if x and y are integers and x>0, is y >0? (1) 7x-2y >0 (2) - y< x 7. are xa and y both positive? (1) 2x-2y=1 (2) x/y > 1 8. if two sides of a trianglle have lengths 2 and 5, which of the following could be the perimeter of the triangle? (一) 9 (二)15 (三)19 ans : none! 阿!!!一次有好多問題! 我對數字比較大小的問題非常不會! 是不是每次都一定要帶數字阿? 我實在頭痛了我! 請大家幫我看看這幾道!大概都是prep的!然後我有搜尋過傷咖但是它沒有的! btw, 為啥我無法搜尋cd, 不是按搜尋進去,寫出重要字即可嗎?可是我每次都無法找到耶! 怪了! 謝謝大家! --

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