[hide=D stands for Dedekind, Z stands for Zermelo]they had two problem sets under those two names[/hide] 

[b]D1.[/b] The product of two positive integers is $5$. What is their sum?


[b]D2.[/b] Gavin is $4$ feet tall. He walks $5$ feet before falling forward onto a cushion. How many feet is the top of Gavin’s head from his starting point?


[b]D3.[/b] How many times must Nathan roll a fair $6$-sided die until he can guarantee that the sum of his rolls is greater than $6$?


[b]D4 / Z1.[/b] What percent of the first $20$ positive integers are divisible by $3$?


[b]D5.[/b] Let $a$ be a positive integer such that $a^2 + 2a + 1 = 36$. Find $a$.


[b]D6 / Z2.[/b] It is said that a sheet of printer paper can only be folded in half $7$ times. A sheet of paper is $8.5$ inches by $11$ inches. What is the ratio of the paper’s area after it has been folded in half $7$ times to its original area?


[b]D7 / Z3.[/b] Boba has an integer. They multiply the number by $8$, which results in a two digit integer. Bubbles multiplies the same original number by 9 and gets a three digit integer. What was the original number?


[b]D8.[/b] The average number of letters in the first names of students in your class of $24$ is $7$. If your teacher, whose first name is Blair, is also included, what is the new class average?


[b]D9 / Z4.[/b] For how many integers $x$ is $9x^2$ greater than $x^4$?


[b]D10 / Z5.[/b] How many two digit numbers are the product of two distinct prime numbers ending in the same digit?


[b]D11 / Z6.[/b] A triangle’s area is twice its perimeter. Each side length of the triangle is doubled,and the new triangle has area $60$. What is the perimeter of the new triangle?


[b]D12 / Z7.[/b] Let $F$ be a point inside regular pentagon $ABCDE$ such that $\vartriangle FDC$ is equilateral. Find $\angle BEF$.


[b]D13 / Z8.[/b] Carl, Max, Zach, and Amelia sit in a row with $5$ seats. If Amelia insists on sitting next to the empty seat, how many ways can they be seated?


[b]D14 / Z9.[/b] The numbers $1, 2, ..., 29, 30$ are written on a whiteboard. Gumbo circles a bunch of numbers such that for any two numbers he circles, the greatest common divisor of the two numbers is the same as the greatest common divisor of all the numbers he circled. Gabi then does the same. After this, what is the least possible number of uncircled numbers?


[b]D15 / Z10.[/b] Via has a bag of veggie straws, which come in three colors: yellow, orange, and green. The bag contains $8$ veggie straws of each color. If she eats $22$ veggie straws without considering their color, what is the probability she eats all of the yellow veggie straws?


[b]Z11.[/b] We call a string of letters [i]purple[/i] if it is in the form $CVCCCV$ , where $C$s are placeholders for (not necessarily distinct) consonants and $V$s are placeholders for (not necessarily distinct) vowels. If $n$ is the number of purple strings, what is the remainder when $n$ is divided by $35$? The letter $y$ is counted as a vowel.


[b]Z12.[/b] Let $a, b, c$, and d be integers such that $a+b+c+d = 0$ and $(a+b)(c+d)(ab+cd) = 28$. Find $abcd$.


[b]Z13.[/b] Griffith is playing cards. A $13$-card hand with Aces of all $4$ suits is known as a godhand. If Griffith and $3$ other players are dealt $13$-card hands from a standard $52$-card deck, then the probability that Griffith is dealt a godhand can be expressed in simplest form as $\frac{a}{b}$. Find $a$.


[b]Z14.[/b] For some positive integer $m$, the quadratic $x^2 + 202200x + 2022m$ has two (not necessarily distinct) integer roots. How many possible values of $m$ are there?


[b]Z15.[/b] Triangle $ABC$ with altitudes of length $5$, $6$, and $7$ is similar to triangle $DEF$. If $\vartriangle DEF$ has integer side lengths, find the least possible value of its perimeter.


PS. You should use hide for answers. Collected [url=https://artofproblemsolving.com/community/c5h2760506p24143309]here[/url].
To solve the problem, we need to find the number of possible values of \( m \) such that the quadratic equation \( x^2 + 202200x + 2022m \) has integer roots. This requires the discriminant of the quadratic equation to be a perfect square.

1. **Discriminant Condition**:
   The discriminant of the quadratic equation \( x^2 + bx + c \) is given by \( b^2 - 4ac \). For our quadratic equation \( x^2 + 202200x + 2022m \), the discriminant is:
   \[
   \Delta = 202200^2 - 4 \cdot 2022m
   \]
   For the roots to be integers, \( \Delta \) must be a perfect square. Let \( k^2 \) be this perfect square, so:
   \[
   202200^2 - 4 \cdot 2022m = k^2
   \]

2. **Rewriting the Equation**:
   Rearrange the equation to isolate \( m \):
   \[
   202200^2 - k^2 = 4 \cdot 2022m
   \]
   This can be factored using the difference of squares:
   \[
   (202200 - k)(202200 + k) = 4 \cdot 2022m
   \]

3. **Simplifying the Factors**:
   Let \( a = 202200 - k \) and \( b = 202200 + k \). Then:
   \[
   ab = 4 \cdot 2022m
   \]
   Since \( a \) and \( b \) are both even, let \( a = 2a' \) and \( b = 2b' \). Then:
   \[
   (2a')(2b') = 4 \cdot 2022m \implies a'b' = 2022m
   \]

4. **Prime Factorization**:
   The prime factorization of 2022 is:
   \[
   2022 = 2 \cdot 3 \cdot 337
   \]
   Therefore, \( m \) must be a multiple of 2022. Let \( m = 2022n \). Substituting \( m \) into the equation:
   \[
   a'b' = 2022 \cdot 2022n = 2022^2 n
   \]

5. **Finding Pairs**:
   We need to find pairs \((a', b')\) such that \( a'b' = 2022^2 n \). Since \( a' \) and \( b' \) are factors of \( 2022^2 n \), we need to count the number of ways to factor \( 2022^2 n \) into two factors. 

   The number of pairs \((a', b')\) is determined by the number of divisors of \( 2022^2 \). The number of divisors of \( 2022^2 \) is:
   \[
   (2+1)(2+1)(2+1) = 27
   \]
   Each pair \((a', b')\) corresponds to a unique \( n \). Since \( n \) must be a product of two numbers that sum to 100, we count the pairs from 1 to 50.

6. **Counting the Pairs**:
   The pairs \((a', b')\) that sum to 100 are:
   \[
   (1, 99), (2, 98), \ldots, (50, 50)
   \]
   There are 50 such pairs.

Thus, there are \(\boxed{50}\) possible values of \( m \).