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题目内容
For how many of the five vehicle types is the number of silver vehicles less than 20 percent of the total number of vehicles of that type?
By approximately what percent does the total number of green vehicles exceed the total number of brown vehicles?
For the 5 vehicle types and 6 vehicle colors, what is the average (arithmetic mean) number of vehicles per type per color, rounded to the nearest whole number?


According to the distribution shown above, which age-group contains the median age of Internet users?
Ken has four bills in his wallet that are worth $1, $5, $10, and $20, respectively. How many different sums of money are possible in which one or more of these bills are used?
$$N= 32^{19}-32$$

What is the units digit of $$N$$?
Each of the students in three psychology classes recorded the time it took to memorize a list of numbers. The first class of 24 students had an average (arithmetic mean) time of 62 seconds, the second class of 30 students had an average time of 70 seconds, and the third class of 28 students had an average time of x seconds. If the average time for all 82 students was 67 seconds, which of the following statements must be true?
Indicate all such statements.
$$n=75k$$
$$k$$ is an odd integer.

Quantity A

The least positive prime factor of $$n$$

Quantity B

$$5$$
At a car dealership, Jason earned a total of $$N$$ dollars in commissions for making 15 sales. If the commission on Jason's last sale had been $$$210$$ greater, his average (arithmetic mean) commission on the 15 sales would have been $$x$$ dollars greater.

Quantity A

$$x$$

Quantity B

$$16$$
$$x^2 – x \gt 0$$, and $$|x| \lt 1$$

Quantity A

$$|x|$$

Quantity B

$$x$$
A map scale of 1:50,000 means that 1 unit on the map represents 50,000 of the same units in actual distance. On a map drawn to this scale, approximately how many inches represent an actual distance of 4.5 miles? (1 mile=63,360 inches)
Give your answer to the nearest 0.1 inch.
If $$0 \lt x \lt 1$$, what is the median of $$\frac{x}{2}, x, x^{-1}, \sqrt{x},$$ and $$ x^2$$?
If $$\frac{x+2}{x-3} = \frac{x+1}{x},$$ where $$x \neq 0$$ and $$x \neq 3$$, what is the value of $$x$$?
Give your answer as a fraction.
$$0 \lt y \lt x$$

Quantity A

$$\frac{1}{\frac{x}{y}-1}$$

Quantity B

$$\frac{x}{y}-1$$
The lempira is the currency of Honduras, and the quetzal is the currency of Guatemala. In January 2016, the exchange rates for United States dollars and the other two currencies were 1 United States dollar for 22.48 lempiras and 1 United States dollar for 7.55 quetzales. Based on these exchange rates, approximately what was the value of 1 lempira in quetzales?
$$xy \neq 0$$ and $$x \gt y$$.

Quantity A

$$\frac{1}{x}$$

Quantity B

$$\frac{1}{y}$$
1 nonillion = $$(1,000)^{10}$$
When written as an integer, 1 nonillion has $$k$$ zeros.

Quantity A

$$k$$

Quantity B

$$30$$
$$x^2+x-6=0$$

Quantity A

$$\frac{1}{1+3^x}$$

Quantity B

$$\frac{1}{1+5^x}$$

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