p1. It is known that $m$ and $n$ are two positive integer numbers consisting of four digits and three digits respectively. Both numbers contain the number $4$ and the number $5$. The number $59$ is a prime factor of $m$. The remainder of the division of $n$ by $38$ is $ 1$. If the difference between $m$ and $n$ is not more than $2015$. determine all possible pairs of numbers $(m,n)$. 


p2. It is known that the equation $ax^2 + bx + c = $0 with $a> 0$ has two different real roots and the equation $ac^2x^4 + 2acdx^3 + (bc + ad^2) x^2 + bdx + c = 0$ has no real roots. Is it true that $ad^2 + 2ad^2 <4bc + 16c^3$ ?


p3. A basketball competition consists of $6$ teams. Each team carries a team flag that is mounted on a pole located on the edge of the match field. There are four locations and each location has five poles in a row. Pairs of flags at each location starting from the far right pole in sequence. If not all poles in each location must be flagged, determine as many possible flag arrangements.


p4. It is known that two intersecting circles $L_1$ and $L_2$ have centers at $M$ and $N$ respectively. The radii of the circles $L_1$ and $L_2$ are $5$ units and $6$ units respectively. The circle $L_1$ passes through the point $N$ and intersects the circle $L_2$ at point $P$ and at point $Q$. The point $U$ lies on the circle $L_2$ so that the line segment $PU$ is a diameter of the circle $L_2$. The point $T$ lies at the extension of the line segment $PQ$ such that the area of ​​the quadrilateral $QTUN$ is $792/25$ units of area. Determine the length of the $QT$.


p5. An ice ball has an initial volume $V_0$. After $n$ seconds ($n$ is natural number), the volume of the ice ball becomes $V_n$ and its surface area is $L_n$. The ice ball melts with a change in volume per second proportional to its surface area, i.e. $V_n - V_{n+1} = a L_n$, for every n, where a is a positive constant. It is also known that the ratio between the volume changes and the change of the radius per second is proportional to the area of ​​the property, that is $\frac{V_n - V_{n+1}}{R_n - R_{n+1}}= k L_n$ , where $k$ is a positive constant. If $V_1=\frac{27}{64} V_0$ and the ice ball melts totally at exactly $h$ seconds, determine the value of $h$.
### Step 1: Determine possible values of \( n \)

Given that \( n \) is a three-digit number and the remainder of the division of \( n \) by 38 is 1, we can write:
\[ n \equiv 1 \pmod{38} \]

This implies:
\[ n = 38k + 1 \]
where \( k \) is an integer. Since \( n \) is a three-digit number, we have:
\[ 100 \leq 38k + 1 \leq 999 \]

Solving for \( k \):
\[ 99 \leq 38k \leq 998 \]
\[ \frac{99}{38} \leq k \leq \frac{998}{38} \]
\[ 2.605 \leq k \leq 26.263 \]

Since \( k \) must be an integer:
\[ 3 \leq k \leq 26 \]

Thus, possible values of \( n \) are:
\[ n = 38k + 1 \]
for \( k \) in the range 3 to 26.

### Step 2: Determine possible values of \( m \)

Given that \( m \) is a four-digit number and 59 is a prime factor of \( m \), we can write:
\[ m = 59 \times l \]
where \( l \) is an integer. Since \( m \) is a four-digit number, we have:
\[ 1000 \leq 59l \leq 9999 \]

Solving for \( l \):
\[ \frac{1000}{59} \leq l \leq \frac{9999}{59} \]
\[ 16.949 \leq l \leq 169.483 \]

Since \( l \) must be an integer:
\[ 17 \leq l \leq 169 \]

### Step 3: Check the difference condition

We need to check the condition that the difference between \( m \) and \( n \) is not more than 2015:
\[ |m - n| \leq 2015 \]

### Step 4: Check for the presence of digits 4 and 5

Both \( m \) and \( n \) must contain the digits 4 and 5.

### Step 5: Combine all conditions

We will now check each possible \( n \) and corresponding \( m \) values to see if they satisfy all conditions.

#### Possible values of \( n \):
\[ n = 38k + 1 \]
for \( k \) in the range 3 to 26.

#### Possible values of \( m \):
\[ m = 59l \]
for \( l \) in the range 17 to 169.

#### Check each pair \((m, n)\):

1. For \( n = 457 \) (when \( k = 12 \)):
   - Check \( m \) values:
     - \( m = 59 \times 25 = 1475 \)
     - \( m = 59 \times 26 = 1534 \)

   Both \( 1475 \) and \( 1534 \) contain the digits 4 and 5, and the difference with \( 457 \) is:
   \[ |1475 - 457| = 1018 \]
   \[ |1534 - 457| = 1077 \]

   Both differences are less than 2015.

Thus, the valid pairs \((m, n)\) are:
\[ (1475, 457) \]
\[ (1534, 457) \]

The final answer is \(\boxed{(1475, 457), (1534, 457)}\)