[u]Part 6 [/u]


[b]p16.[/b] Le[b][/b]t $p(x)$ and $q(x)$ be polynomials with integer coefficients satisfying $p(1) = q(1)$. Find the greatest integer $n$ such that $\frac{p(2023)-q(2023)}{n}$ is an integer no matter what $p(x)$ and $q(x)$ are.


[b]p17.[/b] Find all ordered pairs of integers $(m,n)$ that satisfy $n^3 +m^3 +231 = n^2m^2 +nm.$


[b]p18.[/b] Ben rolls the frustum-shaped piece of candy (shown below) in such a way that the lateral area is always in contact with the table. He rolls the candy until it returns to its original position and orientation. Given that $AB = 4$ and $BD =CD = 3$, find the length of the path traced by $A$.


[u]Part 7 [/u]


[b]p19.[/b] In their science class, Adam, Chris, Eddie and Sam are independently and randomly assigned an integer grade between $70$ and $79$ inclusive. Given that they each have a distinct grade, what is the expected value of the maximum grade among their four grades?


[b]p20.[/b] Let $ABCD$ be a regular tetrahedron with side length $2$. Let point $E$ be the foot of the perpendicular
from $D$ to the plane containing $\vartriangle ABC$. There exist two distinct spheres $\omega_1$ and $\omega_2$, centered at points $O_1$ and $O_2$ respectively, such that both $O_1$ and $O_2$ lie on $\overrightarrow{DE}$ and both spheres are tangent to all four of the planes $ABC$, $BCD$, $CDA$, and $DAB$. Find the sum of the volumes of $\omega_1$ and $\omega_2$.


[b]p21.[/b] Evaluate
$$\sum^{\infty}_{i=0}\sum^{\infty}_{j=0}\sum^{\infty}_{k=0} \frac{1}{(i + j +k +1)2^{i+j+k+1}}.$$


[u]Part 8 [/u]


[b]p22.[/b] In $\vartriangle ABC$, let $I_A$, $I_B$ , and $I_C$ denote the $A$, $B$, and $C$-excenters, respectively. Given that $AB = 15$, $BC = 14$ and $C A = 13$, find $\frac{[I_A I_B I_C ]}{[ABC]}$ .


[b]p23.[/b] The polynomial $x +2x^2 +3x^3 +4x^4 +5x^5 +6x^6 +5x^7 +4x^8 +3x^9 +2x^{10} +x^{11}$ has distinct complex roots $z_1, z_2, ..., z_n$. Find $$\sum^n_{k=1} |R(z^2n))|+|I(z^2n)|,$$ where $R(z)$ and $I(z)$ indicate the real and imaginary parts of $z$, respectively. Express your answer in simplest radical form.


[b]p24.[/b] Given that $\sin 33^o +2\sin 161^o \cdot \sin 38^o  = \sin n^o$ , compute the least positive integer value of $n$.


[u]Part 9[/u]


[b]p25.[/b] Submit a prime between $2$ and $2023$, inclusive. If you don’t, or if you submit the same number as another team’s submission, you will receive $0$ points. Otherwise, your score will be $\min \left(30, \lfloor 4 \cdot ln(x) \rfloor \right)$, where $x$ is the positive difference between your submission and the closest valid submission made by another team.


[b]p26.[/b] Sam, Derek, Jacob, andMuztaba are eating a very large pizza with $2023$ slices. Due to dietary preferences, Sam will only eat an even number of slices, Derek will only eat a multiple of $3$ slices, Jacob will only eat a multiple of $5$ slices, andMuztaba will only eat a multiple of $7$ slices. How many ways are there for Sam, Derek, Jacob, andMuztaba to eat the pizza, given that all slices are identical and order of slices eaten is irrelevant? If your answer is $A$ and the correct answer is $C$, the number of points you receive will be: irrelevant? If your answer is $A$ and the correct answer is $C$, the number of points you receive will be:
$$\max \left( 0, \left\lfloor 30 \left( 1-2\sqrt{\frac{|A-C|}{C}}\right)\right\rfloor \right)$$


[b]p27.[/b] Let $ \Omega_(k)$ denote the number of perfect square divisors of $k$. Compute $$\sum^{10000}_{k=1} \Omega_(k).$$
If your answer is $A$ and the correct answer is $C$, the number of points you recieve will be
$$\max \left( 0, \left\lfloor 30 \left( 1-4\sqrt{\frac{|A-C|}{C}}\right)\right\rfloor \right)$$


PS. You should use hide for answers. Rounds 1-5 have been posted [url=https://artofproblemsolving.com/community/c3h3267911p30056982]here[/url]. Collected [url=https://artofproblemsolving.com/community/c5h2760506p24143309]here[/url].
To solve the equation \( n^3 + m^3 + 231 = n^2 m^2 + nm \), we will factorize and analyze the equation step-by-step.

1. **Rewrite the equation:**
   \[
   n^3 + m^3 + 231 = n^2 m^2 + nm
   \]

2. **Rearrange the terms:**
   \[
   n^3 + m^3 + 231 - n^2 m^2 - nm = 0
   \]

3. **Factorize the left-hand side:**
   Notice that \( n^3 + m^3 \) can be factorized using the sum of cubes formula:
   \[
   n^3 + m^3 = (n + m)(n^2 - nm + m^2)
   \]
   However, this does not directly help in simplifying the equation. Instead, we look for another factorization approach.

4. **Consider possible factorizations:**
   We can try to factorize the equation in a form that might reveal integer solutions. Let's rewrite the equation as:
   \[
   n^3 + m^3 + 231 = n^2 m^2 + nm
   \]
   \[
   n^3 + m^3 + 231 - n^2 m^2 - nm = 0
   \]

5. **Test integer solutions:**
   We need to find integer pairs \((m, n)\) that satisfy the equation. We can test small integer values for \(m\) and \(n\) to see if they satisfy the equation.

6. **Check possible values:**
   Let's test some values:
   - For \(m = 4\) and \(n = 5\):
     \[
     5^3 + 4^3 + 231 = 5^2 \cdot 4^2 + 5 \cdot 4
     \]
     \[
     125 + 64 + 231 = 25 \cdot 16 + 20
     \]
     \[
     420 = 400 + 20
     \]
     \[
     420 = 420
     \]
     This is a valid solution.

   - For \(m = 5\) and \(n = 4\):
     \[
     4^3 + 5^3 + 231 = 4^2 \cdot 5^2 + 4 \cdot 5
     \]
     \[
     64 + 125 + 231 = 16 \cdot 25 + 20
     \]
     \[
     420 = 400 + 20
     \]
     \[
     420 = 420
     \]
     This is also a valid solution.

7. **Conclusion:**
   The ordered pairs of integers \((m, n)\) that satisfy the equation are \((4, 5)\) and \((5, 4)\).

The final answer is \( \boxed{ (4, 5) } \) and \((5, 4)\).