GRE数学 易错题型解析

2013-12-03 08:12:58 GRE数学

  1. l1, l2 and l3 are three lines in space

  The number of points at The number of points at

  which lines l1 and l2 intersect which lines l2 and l3 intersect

  1,三条肆意直线,L1和L2的交点的个数与L2和L3的交点的个数没关。

  2. The number of 1/4-inch lengths in 1

  a 4-inch length

  2,是问4英尺中有若干好多个1/4英尺,应该是16个,所以A

  3. The maximun number of solid cubes 4

  having edges of length 1/2 meter that

  can be placed inside a cubical box

  having inside edges of length 1 meter

  3边长为1的立方体里最多能放下几个边长为1/2的立方体,当然是8个咯

  4. Cube C has volume 8 cubic centimeters

  The area of one of the faces of cube C 3 square centimeters

  4立方体体积是8,那一个面的面积当然是4咯

  5. Ms.Smith got an 8 percent cost-of-living raise of $20 per week

  Ms.Smith's new weekly salary $260

  5 x*0.08=20,那x+20=270>260

  6. On a certain number live, if -7 is a distance of 4 from n and 7 is a distance of 18

  from n then n=

  A.25 B.11 C.3 D.-3 E-11

  6应该是-11

  7. For all real numbers a and b. if a?b=a(a+b), then a?(a?b)=

  A. a2+ab B a2+ab+a C a2+a+b D a3+a2b E a3+a2b+a2

  注:a2暗示a平方,a3暗示a立方

 

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