真题汇总:2007年11月22日gre数学真题部分.

　　此题为2007年11月22日gre数学真题部分的内容。

　　1. If d is the standard deviation of x,y and z then what is the standard of x+6,y+6 and z+6?

　　A.d+6

　　B. 6d

　　C.12d

　　D.18d

　　E.None

　　Ans: E

　　2. Out of 45, 25 are married and 38 are houseowners.

　　col A: least no.of houseowners who are married

　　col b: 18

　　Ans: C

　　3. A two digit number is a multiple of 3 and thrice this number has 7 in its units place.

　　col a: the number is

　　col B: 69

　　Ans: D

　　4. (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

　　5. If n is an integer when divided by 17 leaves a reminder 4, what is the reminder when 5n is divided by

　　17

　　Ans : 3

　　6. In a set of 5 numbers, if 7 is the median, 4 is the mode & mean of the largest & second largest

　　number is 20. Find average of 5

　　numbers.

　　Ans: 11

　　7. Where will the point of intersection of the lines 3x + 5y = 7 and 2x - 10y = - 3 lie?

　　A. On X-Axis

　　B. On Y-Axis

　　C. In Quadrant I

　　D. In Quadrant III

　　E. In Quadrant IV

　　Ans: E

　　8.On a street, there are four houses which are to be painted. There is a choice of three colors, and one

　　house will be painted with

　　a single color. In how many ways can the houses be painted?

　　A. 4

　　B. 24

　　C. 64

　　D. 81

　　E. 128

　　Ans: D

　　9. A B

　　+ B A

　　------------

　　C B C

　　------------

　　Col A: B

　　Col B: 2

　　Ans: C

　　10.There was a $25 discount on every purchase of $75 there was a 10% charge on shipping which was

　　added bore the discount

　　and 20% sales tax after the discount was added. If john paid total $300, what was the original amount

　　of purchase if no sales tax

　　was added per $75

　　Ans : 240.

　　11. Consider circle with centre O. AB is a chord of the circle. AOB is a right triangle C is a point on the

　　circumference of circle such

　　that angle BOC = 60 degrees Compare.

　　Col A : area of triangle AOB

　　Col B : area of sector BOC.

　　Ans : B

　　12. A company sold a product for x dollars in 1990. The price of product would increase by 2.5% every

　　year. Which of the following

　　expressions could be used to calculate the price of the product in the year 2000?

　　Ans : x*(1.025)^10

　　13. Given ABCD is a square with perimeter k and M, N, O, P are the midpoints of the square. If with

　　this midpoints another

　　square MNOP is formed then

　　Col A: perimeter of inner square is

　　Col B: 1/2 k

　　Ans: A

　　14. If x is an integer and (x-5)/2 is an integer. Then which of the following is an integer?

　　A. (x+2)^2/9

　　B. (x+2)^2/4 .......

　　Ans: A

　　15. Col A: The number of real roots of 2x-3/7=0

　　Col B: The number of real roots of x^2+3=0

　　Ans: A