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题目内容
How many integers from 100 to 200 are both multiples of 3 and odd numbers?
Set A includes all the integers from 1 to 1,000, inclusive, that are divisible by 3. How many integers in Set A cannot be divided by 5?
If n= 2*3*5*7*11*13*17, then which of the following statements must be true?

I. $$n^{2}$$ is divisible by 600

II. n+19 is divisible by 19

III. $$\frac{(n+4)}{2}$$ is even
If the units digit of 2$$3^{n}$$ is 7 (8 < n < 13), then what is the value of n?
If n is the units digit of $$7^{k}$$, where k is a positive integer, what is the greatest possible value of |n-7|?
What`s the units digit of the positive difference between $$32^{19}$$ and 32?
Quantity A: The remainder when $$7^{13}$$ is divided by 10

Quantity B: 7

When a prime number less than 100 is divided by 5 and 7, the remainder is 2 and 6, respectively. What`s the remainder when the prime number is divided by 8?
y > 4

Quantity A

$$\frac{3y+2}{5}$$

Quantity B

y


If y=1- ($$\frac{1}{x}$$) where x is an integer, then which of the following numbers could be y?

Indicate all such numbers.
Set K consists of all fractions of the form $$\frac{x}{x+2}$$ where x is a positive even integer less than 20. What is the product of all the fractions in Set K ?
If 0 < a < 1 < b, which of the following is true about the reciprocals of a and b?
If n is a positive integer then n+ denotes a number such that n < n+ < n +1.

Quantity A

$$\frac{20+}{4+}$$

Quantity B

5+


If three integers x, y and z all lie between -10 and 10 (inclusive), then the least value of $$\frac{(x-y)}{z}$$ is?
m, n are integers, 15 ≤ m ≤20 , 30 ≤ n ≤35, what is the greatest possible average of ($$\frac{1}{n}$$) and ($$\frac{1}{m}$$)?
$$\frac{1-x}{x-1}$$ = $$\frac{1}{x}$$

Quantity A

x

Quantity B

-$$\frac{1}{2}$$


$$y \neq k \neq 0$$

$$\frac{\sqrt{y}}{4}=\frac{\sqrt{k}}{5}$$

Quantity A

$$\frac{y}{k}$$

Quantity B

$$\frac{25}{16}$$


The ratio of the number of apples to the number of pears is 2 to 3 at first. If 2 more apples are added, how many pears need to be added such that the ratio of the number of apples to the number of pears remains the same?
If a square region with side x and a circular region with radius r have the same area, then x must be how many times as great as r?
During an experiment, the pressure of a fixed mass of gas increased from 40 pounds per square inch (psi) to 50 psi. Throughout the experiment, the pressure, P psi, and the volume, V cubic inches, of the gas varied in such a way that the value of the product PV was constant.

Quantity A

The volume of the gas when the pressure was 40 psi

Quantity B

1.2 times the volume of the gas when the pressure was 50 psi


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