真题汇总:2007年11月21日gre数学真题部分.

　　下面是2007年11月21日gre数学真题部分的内容，希望能够对考生在数学部分的复习有所帮助。

　　1. x-y =5 & xy != 0

　　Col a: 1/x-1/y

　　Col b: 5

　　2. Given f(n+3)=f(n) and

　　f(-1)=6

　　f(0)= 5

　　f(1) = 4

　　then the value of f(Cool is

　　Ans: 6

　　3. Given 0<1

　　Col A: X^50+X^51+x^52

　　ColB : 3(x^52)

　　4. A circle is inscribed in a square of side 2m.

　　ColA: area of circle

　　ColB: pie

　　Ans: C

　　5. x^2+2x-8=0

　　Col A:The sum of the roots

　　Col B: -2

　　Ans: C

　　6. An regular pentagon and an equilateral triangle were given. The perimeter of pentagon is twice that

　　of triangle.

　　Col A: Side of pentagon

　　Col B: Side of triangle

　　Ans: A

　　7. A telephone company has no.&aposs between 3000-3799. A Company called X uses the numbers from

　　3300-3499. Out of these

　　managers of Division1 level use numbers ending with 0 or 1. What percent of the telephone company

　　numbers are used by

　　Managers of Division1 level of Comany X?

　　Ans: 5%

　　8. x^2=1/5(x^2+(8/x^2)) find the value of x?

　　Col A: x

　　Col B: 2

　　9. A triangle ABC is given. A point D divides the side AB such that a trainge ADC is formed and

　　AD/DB=1/3. If the area of the triangle ABC is r. Find the area of the triangle ADC in terms of r?

　　Ans: r/4

　　10. If x = -1 then (1/x)+(1/x^2)+(1/x^3)+(1/x^4)=?

　　Ans: 0

　　11. If x is a positive number which leaves a remainder 2 when divided by 8 and when divided by 5 it

　　leaves a remainder 3. Find the least possible number?

　　col A: x

　　col B: 18

　　Ans: C

　　12. In a room there are more than 12 members which are divided into a 5 member group and a

　　8member group and a 12 member

　　group. Find the least possible members in that room such that finally none were lt?

　　Col A the members in the room

　　Col B: 120

　　Ans: C

　　13. |x-2|>4 then which of the following is true with the above realation

　　A) -26

　　B) -4<4

　　C) -2<4

　　D) -6<6

　　Ans: A

　　14. A rectangular aquarium base has dimensions 10*8 and height 10. Aquarium is filled upto the height

　　of 6, a solid bar is immersed

　　into it... there by increasing the water level to 7.

　　Col a: the bar dimensions

　　Col b: 100 cubics

　　Ans:B

　　15. Col A: 50 square + 51 Square + 52 square

　　Col B: 3(square of 52)

　　Ans: B

　　16. Mode of certain list is given as 45

　　Col A: find the mean

　　Col B: 45

　　Ans: D