3 GMAT math questions, find translation, and solve

If the duration of the hit ** is rounded up to an integer of minutes.

For example, 3 minutes and 20 seconds and 3 minutes and 40 seconds are recorded as 4 minutes to be charged, and there should be specific conditions under this question.

What percentage of retailers buy computers for business purposes?

1.。Eighty-five percent of retailers with stores buy computers for business purposes.

2.。40% of retailers own stores.

This question should be a DS question, choose E, because it is impossible to know how many of the 60% of those retailers who do not have stores buy computers for commercial purposes, so there is no conclusion anyway.

66 people, up to 6 people have birthdays in the same month, ask if at least 1 person's birthday is in January? Hidden conditions for 12 months a year.

1.。There are more people with birthdays in February than in March.

2.。There are 5 people whose birthdays are in March.

This is also a DS question.

Condition 1. From the fact that there are more people in February than in March, and the maximum number of people in February is 6, the maximum number of people in March is 5, and the total number of people in the other 11 months is 61, because the maximum number of people in a single month is 6, so there must be at least 1 person in January, sufficient

Condition 2. In fact, the inference is the same as that of condition 1, and the idea is the same, so sufficient

Sufficiently separated, choose D

Welcome to ask, I scored 50 points in mathematics in three exams, and I can't guarantee that all of them are correct, but I still have a certain accuracy rate.

Pick B. The question says that x is a number between 0 and 1, and asks whether the decile digit of x is a non-zero number when it is expressed as a decimal.

First of all, 1,16x is an integer, then 1 16, 2 16 are fine, and 1 16=, 2 16=, you can't be sure whether the tenth bit of x is non-zero.

Looking at 2 again, 8x is an integer, then x is at least equal to 1 8=, and the decile is a non-zero number.

To sum up, choose B.

For every dollar he saves this year, he will have 1+r dollars next year. For example, if he saves a total of $50 this year, he will have 50 (1+r) total assets next year.

The meaning of this question, I want to understand it correctly, this way:

Assuming that the requested ratio is x (i.e., the proportion of money saved this year), the total property for this year is m.

Then there is xm(1+r)=(1 2)(1-x)mx=1 (3+2r).

The above personal understanding, don't blame you for being wrong--

Let's save x and spend y this year

then take out x(1+r) next year

Let x(1+r)=y 2 give the fraction=x x+y=x x(2r+3)=1 2r+3 required by y=2x(1+r).