Sec 2 Big book Q 5 and 11

GRE Quant Problem Solving
1

image
image1920×1080 255 KB
image
image1920×1080 255 KB

The answer to 5 is D. Is that because the question is asking about grams?
The answer to 11 is A. At first I divided the mpg by miles, so I divided 24 by 30, but I should have divided 30 by 24. Is that correct?

2
  1. Yes.
  2. A is in the city and B is in the highway. So you need to first convert city to highway -> 24 * 5/3 = 40. Now, 30/24 > 45/40. This gives A as the answer.
1 Like
3

Yes

Yes, you should have divided 30 by 24
When you do that, you divide mile by mpg and m/mpg = gallon

4

Great thank you!
So whatever unit the question is asking for should be in the numerator?

5

Yes, and everything else should cancel out