
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
**p1.** If  $n$  is a positive integer such that  $2n+1 = 144169^2$ , find two consecutive numbers whose squares add up to  $n + 1$ .**p2.** Katniss has an n sided fair die which she rolls. If  $n > 2$ , she can either choose to let the value rolled be her score, or she can choose to roll a  $n - 1$  sided fair die, continuing the process. What is the expected value of her score assuming Katniss starts with a  $6$  sided die and plays to maximize this expected value?**p3.** Suppose that  $f(x) = x^6 + ax^5 + bx^4 + cx^3 + dx^2 + ex + f$ , and that  $f(1) = f(2) = f(3) = f(4) = f(5) = f(6) = 7$ . What is  $a$ ?**p4.**  $a$  and  $b$  are positive integers so that  $20a+12b$  and  $20b-12a$  are both powers of  $2$ , but  $a+b$  is not. Find the minimum possible value of  $a + b$ .**p5.** Square  $ABCD$  and rhombus  $CDEF$  share a side. If  $m\angle DCF = 36^o$ , find the measure of  $\angle AEC$ .**p6.** Tom challenges Harry to a game. Tom first blindfolds Harry and begins to set up the game. Tom places  $4$  quarters on an index card, one on each corner of the card. It is Harry’s job to flip all the coins either face-up or face-down using the following rules:
(a) Harry is allowed to flip as many coins as he wants during his turn.
(b) A turn consists of Harry flipping as many coins as he wants (while blindfolded). When he is happy with what he has flipped, Harry will ask Tom whether or not he was successful in flipping all the coins face-up or face-down. If yes, then Harry wins. If no, then Tom will take the index card back, rotate the card however he wants, and return it back to Harry, thus starting Harry’s next turn. Note that Tom cannot touch the coins after he initially places them before starting the game.
Assuming that Tom’s initial configuration of the coins weren’t all face-up or face-down, and assuming that Harry uses the most efficient algorithm, how many moves maximum will Harry need in order to win? Or will he never win?


PS. You had better use hide for answers.

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