Data Sufficiency

Would you please use Picking Numbers and/or Straightforward Math to solve these questions Please be simple. (not Algebra). Thanks.


1- If M is an integer such that (-2)^2m = 2^9-m, then M= ?

(Please note for this problem I do not understand how (-2)^2 is the same as 2^2m )



2- If R,S, and T are nonzero integers, is R^5 S^3 T^4 ?

(1) R T is negative

(2) S is Negative


3- If X is a positive integers, is square root X an integer?

(1) square root 4x is an integer

(2) Square root 3x is not an integer


4- Is x < y ?

(1) Z < Y

(2) Z < X


5- If n is positive, is square root n > 100 ?

(1) square root n-1 > 99

(2) Square n+1 > 101


6- Is x Between 0 and 1 ?

(1) x^2 is less then X

(2) X^3 is positive


7- Is p^2 an odd integer ?

(1) P is an odd integer

(2) square root P an odd integer


8- If m and n are nonzero integers, is m^n an integer?

(1) n^m is positive

(2) n^m is an integer


9- What us the value of XY ?

(1) x+ Y = 10

(2) x -y = 6



Note for number 10 I can not replicate the image In GMAT Book but the image is a retangle box and top represented by L (as length) and on the side represented by W (as With)



10 - If L and W represents the length and with, respectively, of the rectangle above, what is the perimeter?

(1) 2L + w = 40

(2) L + W = 25 [/b]