
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
<u>Round  1</u>**p1.** A box contains  $1$  ball labelledW,  $1$  ball labelled  $E$ ,  $1$  ball labelled  $L$ ,  $1$  ball labelled  $C$ ,  $1$  ball labelled  $O$ ,  $8$  balls labelled  $M$ , and  $1$  last ball labelled  $E$ . One ball is randomly drawn from the box. The probability that the ball is labelled  $E$  is  $\frac{1}{a}$  . Find  $a$ .**p2.** Let   $$ G +E +N = 7 $$    $$ G +E +O = 15 $$    $$ N +T = 22. $$  Find the value of  $T +O$ .**p3.** The area of  $\vartriangle LMT$  is  $22$ . Given that  $MT = 4$  and that there is a right angle at  $M$ , find the length of  $LM$ .


<u>Round 2</u>**p4.** Kevin chooses a positive  $2$ -digit integer, then adds  $6$  times its unit digit and subtracts  $3$  times its tens digit from itself. Find the greatest common factor of all possible resulting numbers.**p5.** Find the maximum possible number of times circle  $D$  can intersect pentagon  $GRASS'$  over all possible choices of points  $G$ ,  $R$ ,  $A$ ,  $S$ , and  $S'$ .**p6.** Find the sum of the digits of the integer solution to  $(\log_2 x) \cdot (\log_4 \sqrt{x}) = 36$ .


<u>Round 3</u>**p7.** Given that  $x$  and  $y$  are positive real numbers such that  $x^2 + y = 20$ , the maximum possible value of  $x + y$  can be written as  $\frac{a}{b}$  where  $a$  and  $b$  are relatively prime positive integers. Find  $a +b$ .**p8.** In  $\vartriangle DRK$ ,  $DR = 13$ ,  $DK = 14$ , and  $RK = 15$ . Let  $E$  be the point such that  $ED = ER = EK$ . Find the value of  $\lfloor DE +RE +KE \rfloor$ .**p9.** Subaru the frog lives on lily pad  $1$ . There is a line of lily pads, numbered  $2$ ,  $3$ ,  $4$ ,  $5$ ,  $6$ , and  $7$ . Every minute, Subaru jumps from his current lily pad to a lily pad whose number is either  $1$  or  $2$  greater, chosen at random from valid possibilities. There are alligators on lily pads  $2$  and  $5$ . If Subaru lands on an alligator, he dies and time rewinds back to when he was on lily pad number  $1$ . Find how many times Subaru is expected to die before he reaches pad  $7$ .


<u>Round 4</u>**p10.** Find the sum of the following series:   $$ \sum^{\infty}_{i=1} = \frac{\sum^i_{j=1} j}{2^i}=\frac{1}{2^1}+\frac{1+2}{2^2}+\frac{1+2+3}{2^3}+\frac{1+2+3+4}{2^4}+...  $$  **p11.** Let  $\phi (x)$  be the number of positive integers less than or equal to  $x$  that are relatively prime to  $x$ . Find the sum of all  $x$  such that  $\phi (\phi(x)) = x -3$ . Note that  $1$  is relatively prime to every positive integer.**p12.** On a piece of paper, Kevin draws a circle. Then, he draws two perpendicular lines. Finally, he draws two perpendicular rays originating from the same point (an  $L$  shape). What is the maximum number of sections into which the lines and rays can split the circle? 


<u>Round 5</u>**p13.** In quadrilateral  $ABCD$ ,  $\angle A = 90^o$ ,  $\angle C = 60^o$ ,  $\angle ABD = 25^o$ , and  $\angle BDC = 5^o$ . Given that  $AB = 4\sqrt3$ , the area of quadrilateral  $ABCD$  can be written as  $a\sqrt{b}$ . Find  $10a +b$ .**p14.** The value of   $$ \sum^6_{n=2} \left( \frac{n^4 +1}{n^4 -1}\right) -2 \sum^6_{n=2}\left(\frac{n^3 -n^2+n}{n^4 -1}\right) $$     can be written as  $\frac{m}{n}$  where  $m$  and  $n$  are relatively prime positive integers. Find  $100m+n$ .**p15.** Positive real numbers  $x$  and  $y$  satisfy the following  $2$  equations.   $$ x^{1+x^{1+x^{1+...}}}= 8 $$    $$ \sqrt[24]{y +\sqrt[24]{y + \sqrt[24]{y +...}}} = x $$  Find the value of  $\lfloor y \rfloor$ .


PS. You should use hide for answers.  Rounds 6-9 have been posted [here](https://artofproblemsolving.com/community/c3h3167130p28823260). Collected [here](https://artofproblemsolving.com/community/c5h2760506p24143309).

Present the answer in LaTex format: \boxed{Your answer}
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