GMAT experts, can anyone help me with these problems? I've been trying, but hitting walls... I'm much more of a verbal person than quant. Any help would be greatly appreciated, and I will lavish you in compliments/gratitude via internet. THANK YOU.

DATA SUFFICIENCY QUESTION:

1) If x is a prime number, what is the value of x?

(1) x<15

(2) (x-2) is a multiple of 5

*The answer key says the answer is (E) statements 1 & 2 taken together are not sufficient to answer, but I thought it was (C) statements 1 & 2 together are sufficient to answer, since the only number x could be is 7...?

2) Steve gets on the elevator at the 11th floor of a building and rides up at a rate of 57 floors per minute. At the same time Joyce gets on an elevator on the 51st floor of the same building and rides down at a rate of 63 floors per minute. If they continue traveling at those rate, at which floor will their paths cross?

a. 19

b. 28

c. 30

d. 32

e. 44

*I ruled out answers d and e since I know the floor has to be below the midway point between the 11th floor and 51st floor. But where do I go from there?

3) If both 5^2 and 3^3 are factors of n * 2^5 * 6^2 * 7^3, what is the smallest possible positive value of n?

a. 25

b. 27

c. 45

d. 75

e. 125

*no clue on this one... help?

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