pathaniaus you gotta stop smoking man

The answer is 4. There are only 4 different prime factors: 2, 3, 5, and 7.

I'd go with E w/o even testing any numbers.

IMO extremely vague problem. What's the source?

Rephrase the question:

Is 3 < m < 13 < n. Is n divisible by m?

(1) 3n is divisible by m
(2) 13n is divisible by m.

(1) does not give us anything.
(2) 13n is divisible by m. 13 is prime number and it cannot be a factor of m, hence n/m has to be an integer, hence the answer is B

(ii) price of flowers is r, r-0.75, and r+0.25 respectively. Hence price of plantations is rn, 3n(r-0.75), and 4n(r+0.25). Dropping the n I got r, 3r-2.25, and 4r+1. This is not enough to determine which is most expensive (try diff numbers). Insufficient. Obviously r>0, then 4r+1 > r and 4r+1 > 3r ...

If even speed = constant speed, then the answer is (C)

From (A) we learn that first 4 hours the speed was 56mph, from (B) we learn that last 8 hours the avg. speed os 56mph. Hence 56mph is overall average speed.

Given that S>0. Is S>T? (1) | st | = t t is obviously not negative. We know that s is positive, hence we can drop absolute value. We have s*t = t <=> {t = 0 AND s >0} {t > 0 AND s = 1} INSUFF (2) | st | = 7 1 * 7 = |1 * -7| = 7 INSUFF Combine both. t cannot be 0, hence t > 0 and s = 1 (from A). s = ...

x^2+x>-y^2 <=> x^2 + y^2 + x > 0?
(1) x^2+y^2=1
INSUFF, with x = -1, y = 0, the equation is exactly 0
(2) x>0
SUFF

(B)