GMAT Math

I'll make you a deal -- I'll give you the first two... and then you write back and give me your work for the last two and we'll see how you did!

The first answer is 67% : (3.5-2.1) / 2.1 = 66.67%

The second answer is 140% increase : (Old Distance = 0.3 * 1000 = 300); (New Distance = 0.9 * 800 = 720); (720-300)/300 = 2.4 = 140% increase.

For the third one, since the question is about "individuals per house", I'd think you'd want to create a ratio that allows you to compare across regions -- maybe divide # individuals by the sum of state+private houses?

For the fourth one, I'd first create a ballpark price for each region. (On paper.) Then, I'd use the sum of state+private houses from number 3 and multiply that by the price for each region.

Question -- where did these questions come from?

Thanks.

-Brian

For question 3 -- as an example... for Northern, I'd divide 15.7M / (3.8M + 7.2M) = X... do the same for each region and figure out which ratio is highest.

For 4... Northern = (160,000 * (3.8M + 7.2M)) = X; Midland = (160,000 * 1.10) * (4.2M + 8.7M) = Y... etc... which is highest.

Thoughts?

-Brian