p1. Given the set $H = \{(x, y)|(x -y)^2 + x^2 - 15x + 50 = 0$ where x and y are natural numbers $\}$.
Find the number of subsets of $H$.


p2. A magician claims to be an expert at guessing minds with following show. One of the viewers was initially asked to hidden write a five-digit number, then subtract it with the sum of the digits that make up the number, then name four of the five digits that make up the resulting number (in order of any). Then the magician can guess the numbers hidden. For example, if the audience mentions four numbers result: $0, 1, 2, 3$, then the magician will know that the hidden number is $3$.
a. Give an example of your own from the above process.
b. Explain mathematically the general form of the process.


p3. In a fruit basket there are $20$ apples, $18$ oranges, $16$ mangoes, $10$ pineapples and $6$ papayas. If someone wants to take $10$ pieces from the basket. After that, how many possible compositions of fruit are drawn?


p4. Inside the Equator Park, a pyramid-shaped building will be made with base of an equilateral triangle made of translucent material with a side length of the base $8\sqrt3$ m long and $8$ m high. A globe will be placed in a pyramid the. Ignoring the thickness of the pyramidal material, determine the greatest possible length of the radius of the globe that can be made.


p5. What is the remainder of $2012^{2012} + 2014^{2012}$ divided by $2013^2$?
1. Given the equation \((x - y)^2 + x^2 - 15x + 50 = 0\), we need to find the natural number pairs \((x, y)\) that satisfy this equation.
2. Let's rewrite the equation in a more manageable form:
   \[
   (x - y)^2 + x^2 - 15x + 50 = 0
   \]
3. We can complete the square for the \(x\) terms:
   \[
   x^2 - 15x + 50 = (x - \frac{15}{2})^2 - \frac{225}{4} + 50 = (x - \frac{15}{2})^2 - \frac{25}{4}
   \]
4. Substituting this back into the original equation, we get:
   \[
   (x - y)^2 + (x - \frac{15}{2})^2 - \frac{25}{4} = 0
   \]
5. Multiplying through by 4 to clear the fraction:
   \[
   4(x - y)^2 + 4(x - \frac{15}{2})^2 - 25 = 0
   \]
   \[
   4(x - y)^2 + 4(x - \frac{15}{2})^2 = 25
   \]
6. Recognizing that \(25 = 5^2\), we can rewrite the equation as:
   \[
   4(x - y)^2 + 4(x - \frac{15}{2})^2 = 5^2
   \]
7. This implies that the sum of two squares equals \(5^2\). The possible pairs \((a, b)\) such that \(a^2 + b^2 = 25\) are \((0, 5)\), \((3, 4)\), \((4, 3)\), and \((5, 0)\).
8. We now solve for \(x\) and \(y\) in each case:
   - For \(2(x - y) = 0\) and \(2x - 15 = 5\):
     \[
     x - y = 0 \implies x = y
     \]
     \[
     2x - 15 = 5 \implies 2x = 20 \implies x = 10
     \]
     Thus, \((x, y) = (10, 10)\).
   - For \(2(x - y) = 0\) and \(2x - 15 = -5\):
     \[
     x - y = 0 \implies x = y
     \]
     \[
     2x - 15 = -5 \implies 2x = 10 \implies x = 5
     \]
     Thus, \((x, y) = (5, 5)\).
   - For \(2(x - y) = 4\) and \(2x - 15 = 3\):
     \[
     x - y = 2
     \]
     \[
     2x - 15 = 3 \implies 2x = 18 \implies x = 9
     \]
     \[
     y = x - 2 = 9 - 2 = 7
     \]
     Thus, \((x, y) = (9, 7)\).
   - For \(2(x - y) = 4\) and \(2x - 15 = -3\):
     \[
     x - y = 2
     \]
     \[
     2x - 15 = -3 \implies 2x = 12 \implies x = 6
     \]
     \[
     y = x - 2 = 6 - 2 = 4
     \]
     Thus, \((x, y) = (6, 4)\).
   - For \(2(x - y) = -4\) and \(2x - 15 = 3\):
     \[
     x - y = -2
     \]
     \[
     2x - 15 = 3 \implies 2x = 18 \implies x = 9
     \]
     \[
     y = x + 2 = 9 + 2 = 11
     \]
     Thus, \((x, y) = (9, 11)\).
   - For \(2(x - y) = -4\) and \(2x - 15 = -3\):
     \[
     x - y = -2
     \]
     \[
     2x - 15 = -3 \implies 2x = 12 \implies x = 6
     \]
     \[
     y = x + 2 = 6 + 2 = 8
     \]
     Thus, \((x, y) = (6, 8)\).

9. The set \(H\) is \(\{(10, 10), (5, 5), (9, 7), (6, 4), (9, 11), (6, 8)\}\), which has 6 elements.
10. The number of subsets of a set with \(n\) elements is \(2^n\). Therefore, the number of subsets of \(H\) is:
    \[
    2^6 = 64
    \]

The final answer is \(\boxed{64}\)