#### 题目列表

There are two parallel lines, and the third line intersects these two lines.
Quantity A: The number of points with equal distance from three lines
Quantity B: 3
Integer x and y which have the same tens digits. The sum of x and y is 87, and x < y (x and y are positive integers). How many distinct pairs of x and y satisfy the above rule?
n is an integer greater than 200 and less than 300, and has a tens digit of x and units digit of 5

Quantity A: n/5

Quantity B: 40+2x
The value of a two-digit integer is twice as many as the sum of its tens digit and units digits. What is the two-digit integer?
What is the greatest possible value of n such that n is an even and the result is 530?
Both m and n are positive integers and 3m+4n =13

Quantity A: n

Quantity B:2
What is the total number of three-digit integers where the sum of all the digits is 4 from 100 to 999, inclusive?
Set S consists of points(x,y)such that 2x+3y≤7 where x and y are positive integers. What is the number of the points in set S?
In a store, price of small-sized coffee beans is $k per bag, while price of larger coffee beans is$m per bag. If someone buys four bags of coffee beans in the store at a price of \$30 in total, then k and m could be?

Indicate all such possible combinations.
To buy n stamps each of which is 0.32 dollar, a person paid some 1-dollar bills and then received the change of 0.08 dollar.

Quantity A: n

Quantity B: 9
rt=8, where r and t are positive integers

Quantity A: r+t

Quantity B: 12
Select 5 numbers from the nine numbers, namely 1~9 (inclusive), to sum up

Quantity A:The number of possible ways that the sum of these five numbers is 22

Quantity B:The number of possible ways that the sum of these five numbers is 28
At most how many integers less than 25 could be the sum of the positive multiple of 4 and the positive multiple of 5?
If x,y,z are positive integers,and x+y+z=7,then how many different solutions are there?
The average of four different integers is 30,if the minimum integer is 27,what is the greatest possible value of the integers?
The average of 5 different positive integers is 8, what might be the greatest possible value of the 5 integers?
The sum of 10 positive integers is 101, and none of these integers is twice more than the other. What is the largest possible number among these 10 numbers?
The sum of three positive integers is 76,and x is the greatest one. What is the least possible value of x?
-8≤h≤10,m+h=-4.What is the least possible value of m*h?
When selecting four different integers from -5 to 4, inclusive, what is the least possible product of these four numbers?

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