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## Floor and Ceiling Functions

Floor functions map a real number x to the largest integer less than or equal to x. You can probably guess what the ceiling function does.

# Level 3

$\large {\lfloor -3.2 \rfloor =\, ? }$

Given that $$x$$ is a real number but not an integer, compute $$\lfloor x \rfloor + \lfloor - x \rfloor$$.

$\left\lfloor \left| \frac{2x-3}{4} \right| \right\rfloor = 5$

What is the largest negative integer $$x$$ that satisfies the equation above?

$\large\left\lfloor \frac { x }{ 1! } \right\rfloor +\left\lfloor \frac { x }{ 2! } \right\rfloor +\left\lfloor \frac { x }{ 3! } \right\rfloor =224$

Find the integer value of $$x$$ that satisfies the equation above.

Note: $$\lfloor x \rfloor$$ means the greatest integer that is smaller or equal to $$x$$.

$\Large{\lceil x^2 \rceil=\lfloor 2|x| \rfloor}$ How many integers satisfy the above equation?

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