[b]p1.[/b] Let $a$ be an integer. How many fractions $\frac{a}{100}$ are greater than $\frac17$ and less than $\frac13$ ?.


[b]p2.[/b] Justin Bieber invited Justin Timberlake and Justin Shan to eat sushi. There were $5$ different kinds of fish, $3$ different rice colors, and $11$ different sauces. Justin Shan insisted on a spicy sauce. If the probability of a sushi combination that pleased Justin Shan is $6/11$, then how many non-spicy sauces were there?


[b]p3.[/b] A palindrome is any number that reads the same forward and backward (for example, $99$ and $50505$ are palindromes but $2020$ is not). Find the sum of all three-digit palindromes whose tens digit is $5$.


[b]p4.[/b] Isaac is given an online quiz for his chemistry class in which he gets multiple tries. The quiz has $64$ multiple choice questions with $4$ choices each. For each of his previous attempts, the computer displays Isaac's answer to that question and whether it was correct or not. Given that Isaac is too lazy to actually read the questions, the maximum number of times he needs to attempt the quiz to guarantee a $100\%$ can be expressed as $2^{2^k}$. Find $k$.


[b]p5.[/b] Consider a three-way Venn Diagram composed of three circles of radius $1$. The area of the entire Venn Diagram is of the form $\frac{a}{b}\pi +\sqrt{c}$ for positive integers $a$, $b$, $c$ where $a$, $b$ are relatively prime. Find $a+b+c$. (Each of the circles passes through the center of the other two circles)


[b]p6.[/b] The sum of two four-digit numbers is $11044$. None of the digits are repeated and none of the digits are $0$s. Eight of the digits from $1-9$ are represented in these two numbers. Which one is not?


[b]p7.[/b] Al wants to buy cookies. He can buy cookies in packs of $13$, $15$, or $17$. What is the maximum number of cookies he can not buy if he must buy a whole number of packs of each size?


[b]p8.[/b] Let $\vartriangle ABC$ be a right triangle with base $AB = 2$ and hypotenuse $AC = 4$ and let $AD$ be a median of $\vartriangle ABC$. Now, let $BE$ be an altitude in $\vartriangle ABD$ and let $DF$ be an altitude in $\vartriangle ADC$. The quantity $(BE)^2 - (DF)^2$ can be expressed as a common fraction $\frac{a}{b}$ in lowest terms. Find $a + b$.


[b]p9.[/b] Let $P(x)$ be a monic cubic polynomial with roots $r$, $s$, $t$, where $t$ is real. Suppose that $r + s + 2t = 8$, $2rs + rt + st = 12$ and $rst = 9$. Find $|P(2)|$.


[b]p10.[/b] Let S be the set $\{1, 2,..., 21\}$. How many $11$-element subsets $T$ of $S$ are there such that there does not exist two distinct elements of $T$ such that one divides the other?


PS. You should use hide for answers. Collected [url=https://artofproblemsolving.com/community/c5h2760506p24143309]here[/url].
To solve this problem, we need to find the area of a three-way Venn Diagram composed of three circles of radius 1, where each circle passes through the center of the other two circles. The area of the entire Venn Diagram is given in the form \(\frac{a}{b}\pi + \sqrt{c}\) for positive integers \(a\), \(b\), and \(c\), where \(a\) and \(b\) are relatively prime. We need to find \(a + b + c\).

1. **Understanding the Geometry**:
   - Each circle has a radius of 1.
   - Each circle passes through the center of the other two circles.
   - The centers of the three circles form an equilateral triangle with side length equal to the radius of the circles, which is 1.

2. **Area of the Equilateral Triangle**:
   - The side length of the equilateral triangle formed by the centers of the circles is 1.
   - The area \(A_{\text{triangle}}\) of an equilateral triangle with side length \(s\) is given by:
     \[
     A_{\text{triangle}} = \frac{\sqrt{3}}{4} s^2
     \]
   - Substituting \(s = 1\):
     \[
     A_{\text{triangle}} = \frac{\sqrt{3}}{4} \cdot 1^2 = \frac{\sqrt{3}}{4}
     \]

3. **Area of the Three Circles**:
   - The area of one circle with radius 1 is:
     \[
     A_{\text{circle}} = \pi \cdot 1^2 = \pi
     \]
   - The total area of the three circles is:
     \[
     3 \pi
     \]

4. **Overlapping Areas**:
   - Each pair of circles overlaps in a lens-shaped region.
   - The area of each lens-shaped region can be found by subtracting the area of the equilateral triangle from the area of the sector of the circle.
   - The angle subtended by each sector is \(60^\circ\) or \(\frac{\pi}{3}\) radians.
   - The area of one sector is:
     \[
     A_{\text{sector}} = \frac{1}{6} \pi \cdot 1^2 = \frac{\pi}{6}
     \]
   - The area of one lens-shaped region is:
     \[
     A_{\text{lens}} = 2 \left( \frac{\pi}{6} - \frac{\sqrt{3}}{4} \right) = \frac{\pi}{3} - \frac{\sqrt{3}}{2}
     \]
   - There are three such lens-shaped regions, so the total area of the overlapping regions is:
     \[
     3 \left( \frac{\pi}{3} - \frac{\sqrt{3}}{2} \right) = \pi - \frac{3\sqrt{3}}{2}
     \]

5. **Total Area of the Venn Diagram**:
   - The total area of the Venn Diagram is the area of the three circles minus the area of the overlapping regions plus the area of the equilateral triangle:
     \[
     A_{\text{total}} = 3 \pi - \left( \pi - \frac{3\sqrt{3}}{2} \right) + \frac{\sqrt{3}}{4}
     \]
     \[
     A_{\text{total}} = 3 \pi - \pi + \frac{3\sqrt{3}}{2} + \frac{\sqrt{3}}{4}
     \]
     \[
     A_{\text{total}} = 2 \pi + \frac{3\sqrt{3}}{2} + \frac{\sqrt{3}}{4}
     \]
     \[
     A_{\text{total}} = 2 \pi + \frac{6\sqrt{3}}{4} + \frac{\sqrt{3}}{4}
     \]
     \[
     A_{\text{total}} = 2 \pi + \frac{7\sqrt{3}}{4}
     \]

6. **Identifying \(a\), \(b\), and \(c\)**:
   - Comparing with the form \(\frac{a}{b}\pi + \sqrt{c}\), we have:
     \[
     \frac{a}{b} = 2 \quad \text{and} \quad \sqrt{c} = \frac{7\sqrt{3}}{4}
     \]
   - Therefore, \(a = 2\), \(b = 1\), and \(c = 21\).

7. **Sum of \(a\), \(b\), and \(c\)**:
   - The sum is:
     \[
     a + b + c = 2 + 1 + 21 = 24
     \]

The final answer is \(\boxed{24}\).