题目列表

If 1 kilometer is approximately 0.62 mile, what is the approximate speed, in kilometers per hour, of a car that is traveling at a speed of 50 miles per hour?
What fraction of the people in the age-group 20 to 49 indicated newspaper or the Internet as their preferred method to obtain news?

n=1234567891011121314--498499500 (from 1 to 500)

How many digits does n have?
n is an integer made of some consecutive odd numbers from 1. n=13579111315......

What is the units digit of n if it has only 41 digits?
If a and b are integers satisfying the equation $a^{2}$+$b^{2}$=145, which of the following could be the value of a+b?

Indicate all such values.
$x^{2}$+$y^{2}$=52. Both x and y are integers and x > y.

x

Quantity B

4

The sum of three different positive integers is 11.

Which two of the following statements together provide sufficient information to determine the three integers?

Indicate two such statements.
At a toy sale, each toy was sold for either $2 or$3. If a customer bought toys of $15 at the sale, which of the following could have been the total number of toys that the customer bought? Indicate all such values. If a person hits the shaded area, he or she could get 3 points; however, if a person hits the smaller circle, he or she could get p points. If Mark gets 47 points in total, then what`s the possible values of p? Indicate all such values. A customer ordered 391 identical handbags and must choose a shipping plan. The shipper will use any combination of containers of sizes that each hold up to 20 handbags, up to 12 handbags, and up to 5 handbags. The shipping costs for these container sizes are$3, $2, and$1, respectively. At most one of the containers will be shipped holding less than the maximum number of handbags for that container. For the total shipping cost, the cost of using only the containers that hold up to 5 handbags is how much greater than the least possible cost?
The average of 14 different positive integers is 14, what is the greatest possible value of the integers?
There are n positive integers. The sum of the numbers is greater than 50, while the arithmetic average of the numbers is 2.5. What is the least value of n?
If 15% of the class is 16 years or older, then at least how many students are in the class?
The ratio of the number of female members of a club to the number of all members of the club is 4 to 7. Which of the following could be the number of male members of the club?

Indicate all such numbers.
If k is an integer and 121 < $k^{2}$ < 225, then k can have at most how many values?
Both x and y are integers, and 1 < -x < 4, 2 < y < 5. What is the least possible value of xy?
$x^{4}$$y^{3}$$z^{2}$ < 0 (x, y and z are all integers)

xyz

Quantity B

0

n is an integer and 5n−1 is a positive even integer

Quantity A

$(-1)^{n+1}$

Quantity B

1

For all positive integer n, the function f is defined by the equation f(n)= $\frac{n(n+1)}{2}$

m is a positive integer

Quantity A

$(-1)^{f(4m+1)}$

Quantity B

$(-1)^{f(4m+2)}$

A set of k consecutive integers, including 2. The sum of the integers in the set is -11.

k

10

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