8th april Gre Quants Question

Quant:
1.



Given that, if the area of the triangle STR is 1/9th area of the equilateral triangle PQR, then what is the ratio of QT/TR?
A. 1:3
B. 3:1
C. 2:1
& so on…..
Ans: C


2. Given a set of five numbers 27, 29, 35, 9, 25 & 16, on increasing each number by ‘K’ if the new mean of the set becomes 29.5, then what is the new median?
Ans: 32


3. 3. If a1=2 and an+1= (an-1)^2, then what is the value of a15?
A. 2^8
B. 2^16
C. 2^32
D. 2^128
E. 2^256
Ans: D


4. Given that, if |x| = |y| and xy<0, then
Col A: x-y
Col B: 0
Ans: D


5. If the equation of two lines ‘L’ & ‘M’ are 7x – 4y = 1 and 10x + 5y + 3 = 0, then
Col A: Slope of the line ‘L’
Col B: Slope of the line ‘M’
Ans: A


6. Given that an amount of 2000$ is given for annual interest at rate of 'r'%. If 150$ is received as an interest for 1 year then find the rate of interest ‘r’%?
Ans: 7.5%


7.



Given P, Q, R, S and A, B, C, D as midpoints of bigger square and smaller square respectively, if on joining these midpoints, if 8 trapeziums are formed as above, then find the perimeter any one of the trapezium?
Ans: 4+sqrt(2)


8. Given volume of a cube as some value(xxx) and asked to find the lateral surface area of the cube?