真题汇总:2007年11月28日gre数学真题部分.

　　Wednesday, November 28, 2007

　　1. A line &aposl&apos passes through (3,-2) and cuts the coordinate axis. line &aposm &apos is perpendicular to line &aposl&apos .

　　Column A : Slope of line m

　　Column B : 3/2

　　Ans:C

　　2. The distance travelled by a train is &aposd&apos and the time taken is h hrs. Next day the train travels the same distance but reaches 15 min early. What is the average speed in terms of &aposd&apos and &aposh&apos?

　　3. 7 is the digit on tens place for X and 8 is the digit for tens place for Y. What is the Tens digit for

　　(X+Y)

　　Ans: 5

　　4. 0<1

　　col A : 1/x

　　col B : 1/x^2

　　5. If n * sqrt(0.01) = 1 then What is the value of n?

　　Ans: 10

　　6. (0.5)^-2 , (0.5)^-1 , (0.5)^0 , (0.5)^1 , (0.5)^2. Find the range of the above numbers

　　Ans: 3.75

　　7. If a line passes through (-3,2) and cuts coordinate axis.

　　Col A: x-intercept of line

　　Col B: y-intercept of line

　　Ans: B

　　8. Given f(x)=x^2+x

　　Col a: f(x+1)

　　Col b: f(x) + f(1)

　　Ans: D

　　9. If a square is inside the circle with its side &aposs&apos then What is the area of the circle?

　　Ans: pi * s^2/2

　　10. Tom brought &aposn&apos shares for &apost&apos dollars( n> 20).Then he sold &aposn-20&apos shares at &apost+1&apos per share and sold the remaining shares at &apost+3&apos per share.

　　Col A: total value of shares sold - total value of shares he bought

　　Col B: t+40

　　Ans: C