Official GRE Quantitative Reasoning

GRE Quant Problem Solving
1

Hello,

  1. In quantity A & B, do they mean the prices after the reduction or the amount of the reduction itself? :

    Ask-13
    Ask-131279×608 81 KB

  2. Also, I can’t understand this! if Mexico is x, Pakistan is y, it means y = 2x, since it says twice as many workers in Mexico, we have workers in Pakistan. Therefore the answer would be 1250!:

    Ask-14
    Ask-141280×320 61.3 KB

2

It’s the amount of reduction itself. When ETS uses “dollar amount” they mean the amount of dollars of the reduction.

We can do this step by step:

If \frac{3}{8} of 6000 work in indonesia, then 2250 are in indonesia which leaves 3750 to work in Mexico and Pakistan.

If y is the number in Mexico and x is the number in Pakistan:

  1. y=2x
  2. y+x=3750

We can substitute 2x for y to get 2x+x=3750. So if 3x is 3750, then x=1250.

So if Pakistan has 1250 people, then Mexico must have 1250 \times 2 = 2500 people.

We can also verify this by adding everything back up:

1250 (Pakistan) + 2500 (Mexico) + 2250 (Indonesia) = 6000.

3

So for the first one, if it means the “reduction” itself, it means the reduction are “20 percent or 0.2” and “0.3” but the answer key says since we don’t have yesterday’s prices, we cannot calculate the reductions. why?

4

My solution for the second problem was correct. However, I’m confused about the statement regarding the number of workers. It claims that the number of workers in Pakistan (x) is twice that of Mexico (y), which means: Pakistan (x) = 2 * Mexico (y). Why does it say the opposite?

5

No, that’s percentage reduction not the reduction itself.

If something is $200 and is reduced by 20%, the dollar value of the reduction is $40.

6

No, it’s the other way round

7

Could you clarify the difference? I’m confused about why it’s considered inverse. I thought Pakistan had twice as many workers as Mexico! Please write one statement indicating that Pakistan has twice the number of workers as Mexico, and another stating that Pakistan has half the number of workers compared to Mexico. I’m struggling with how to express this correctly!

8

Twice as many employees work in the plant at Mexico as work at the plant in Pakistan

  1. Mexico has 2x the number of workers as Pakistan
  2. Pakistan has half the number of workers as Mexico

Twice as many employees work in the plant at Pakistan as work at the plant in Mexico

  1. Pakistan has 2x the number of workers as Mexico
  2. Mexico has half the number of workers as Pakistan