Twice vs. Double

All, I have a general question regarding the use of the word "twice" vs. the use of the word "double." Please see an example below: Facebook has more than 200 million active users, double the number it had last August. Can you use the word "twice" in place of "doub...

Apple100, You divide by 3! since we don't care about the order, and there are 3! different ways (i.e., permutations) to arrange the 3 people. So you have to divide the number of permutations (i.e., 8 x 6 x 4) by 3! so that you count the arrangements of any 3 people only once. Hope this helps. Anyone...

GMAT Prep - Fullerenes

All, Please see the question below: Although fullerenes – spherical molecules made entirely of carbon – were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions ...

Thanks, guys. Two great ways of getting to the answer.

iamcste, you're right. I made an error in my post. (2) should be |x-3| < -y.

Thank you for the clarification and apologies for the confusion.

GMAT Prep - Absolute Values

Hello all,

Please see the question below:

If y&#8805;0, what is the value of x?

(1) |x-3| &#8805; y
(2) |x - 3| &#8805; - y

OA: B

I thought both statements give the exact same information, but would love to get your guys' views. Many thanks.

GMAT Prep

Hello all,

Need help with understanding how to solve the following question efficiently:

Is xy > 0?

(1) x - y > -2
(2) x - 2y < -6

OA: C

Many thanks.[/spoiler]