真题汇总:2009年12月15日gre数学真题部分.

　　Wednesday, December 15, 2009

　　1. Let ‘S’ indicates sum of all even no&aposs from 1 to 100 and ’N’ indicates sum of all odd no&aposs from 1 to 100, then S-N equals to

　　A. 0

　　B. 99

　　C. 100

　　D. 199

　　E. 200

　　(Similar to this)

　　2. If x > 1, then

　　Col A: (x power x) power x

　　Col B: x power (x to power x)

　　3. Col A: 2 power x (4 power x)

　　Col B: 2 power 3x

　　4. Given sets f0, f1, f2, f3, .................. f9 which has numbers according to their unit digits for example f5 has numbers 5, 15, 25, ....... etc. Then, the cubes of the numbers of set f7 are present in which set?

　　A. f2

　　B. f3

　　C. f5

　　D. f7

　　E. f9

　　(Similar to this)

　　5. Given f(x) = 4(x power 2) + 20x + 25; x as an integer.

　　Col A: Minimum value of f(x)

　　Col B: 0

　　6. If a ball is dropped from a height of 6 miles, the ball will bounce back with 90% of its previous height. What is the height of the ball after 5th bounce?

　　A. (6+0.9) power 5

　　B. (6+0.9) power 6

　　C. 6(0.9) power 4

　　D. 6(0.9) power5

　　E. 6(0.9) power 4

　　7. Given mod(2x-3) < 8; x is an integer. Find the number of possible values of ‘x’?

　　A. 1

　　B. 2

　　C. 3

　　D. 4

　　E. 5

　　(Similar to this)

　　8. A circle is inscribed in a square of length ‘x’. Find the area of the circle inscribed in the square?

　　A. (πx^2) / 2

　　B. (πx^2) / 4

　　C. (πx^2)

　　& so on……

　　9. Given that there are two parallel lines. P & Q are points on one parallel line and R & S are points on another parallel line. The distance between PQ is same as the distance between RS. If a point ‘T’ is the mid point of PQ, then

　　Col A: Distance from T to R

　　Col B: Distance from T to S

　　11. Two graphs were given with frequencies on y axis and numbers from 1 to 6 on x axis. The question was to check, which of the following were same for both graphs

　　I. Mean

　　II. Range

　　III. Standard Deviation

　　(Similar to this)

　　12. If the number of ways arranging a word is 180, then what is the word? In options, five words were given.

　　(Something like this)

　　13. Col A: Number of positive factors of (2 power 3)(5 power 4)(7 power 5)

　　Col B: Number of positive factors of (11 power 3)(13 power 4)(17 power 5)

　　14. If DC6 + 2D = D8C. What can be the value of D?

　　A. 0

　　B. 1

　　C. 5

　　D. 8

　　E. 9

　　(Similar to this)

　　15.Given two concentric circles with radius 2 and 5, a tangent is drawn to smaller circle which intersects the larger one at points ‘P’ and ‘T’. Find the length of PT?

　　(Similar to this)

　　16. Given (2)^(-6) < x < (2)^(-5)

　　Col A: 4x

　　Col B: 1/12

　　18. There are 20 colored pencils in a pencil stand. The probability of choosing a yellow pencil is 0.8. If there are 6 yellow pencils without an eraser, then what is the probability that a yellow pencil chosen is the one with eraser?

　　A.1/4

　　B.1/2

　　C.1/8