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Quantity A

The least common multiple of $$10, 15$$, and $$16$$

Quantity B

The least common multiple of $$20, 15$$, and $$16$$


$$E$$ is the set of all positive common multiples of $$7$$ and $$11$$ that are less than $$1,900$$.

Quantity A

The number of integers in $$E$$ that are divisible by $$6$$

Quantity B

The number of integers in $$E$$ that are divisible by $$5$$


$$n$$ is a positive integer.
The remainder when $$5n + 2$$ is divided by $$3$$ is $$1$$.
The remainder when $$5n + 1$$ is divided by $$4$$ is $$1$$.

Quantity A

$$n$$

Quantity B

$$3$$


A string of decorative lights consists of red, green and blue bulbs. The red bulbs flash every $$4$$ seconds, the green bulbs flash every $$6$$ seconds, and the blue bulbs flash every $$9$$ seconds. If all the lights flash simultaneously when the string is first lit, how many seconds will it take until all the lights flash simultaneously the next time?

Quantity A

The greatest common factor of $$5$$ and $$16$$

Quantity B

The greatest common factor of $$25$$ and $$256$$


Let $$n$$ be a positive integer such that the greatest common factor of $$n$$ and $$24$$ is $$12$$. Which of the following could be the least common multiple of $$n$$ and $$24$$?
If the sum of $$x$$ and $$5$$ is divided by $$y$$, the result is $$8$$.

Quantity A

$$x$$

Quantity B

$$y$$


When $$10$$ is divided by the positive integer $$k$$, the remainder is $$k$$-2. Which of the following could be the integer $$k$$?
Indicate all such integers.
When the positive integer $$n$$ is divided by $$35$$, the remainder is $$27$$. What is the remainder when $$n$$ is divided by $$7$$?
If the positive integer $$n$$ is divided by $$30$$, the remainder is $$5$$. Which of the following must be divisible by $$30$$?
When the integer $$n$$ is divided by $$5$$, the remainder is $$2$$. If $$n$$ is between $$13$$ and $$29$$, which of the following integers could be the remainder when $$n$$ is divided by $$4$$?
Indicate all such integers.

Quantity A

The remainder when $$2^5$$ is divided by $$3^3$$

Quantity B

The remainder when $$2^5$$ is divided by $$3^2$$


$$k$$, $$m$$, and $$r$$ are positive integers and $$k \lt m \lt r$$.
When $$m$$ is divided by $$k$$, the remainder is $$0$$.
When $$r$$ is divided by $$k$$, the remainder is $$0$$.

Quantity A

The remainder when $$r$$ is divided by $$m$$

Quantity B

$$k$$


$$n$$ is a positive integer, and the remainder when $$23$$ is divided by $$n$$ is $$2$$.

Quantity A

$$n$$

Quantity B

$$8$$


When the positive integer $$M$$ is divided by $$6$$, the remainder is $$1$$. When $$M$$ is divided by the positive integer $$D$$, the remainder is $$0$$. Which of the following could be the integer $$D$$?
Indicate all such integers.
If $$x$$ is an integer and $$y=3x+2$$, which of the following integers could be a divisor of $$y$$?
Indicate all such integers.

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