p1. In the month of January of a certain year, there were exactly four Mondays and four Fridays. What day of the week was February $ 1$ ?


p2. Determine all positive integers $n$ that have the following property: "Among the positive divisors of  $n$ different than $ 1$ and $n$, the largest is $35$ times the smallest."


p3. Vecindad Island has $2011$ inhabitants, divided into three types: the innocent, the wicked and the capricious, the innocent always tell the truth, the wicked always lie, and the capricious alternately tell lies one day and truths the next. A reporter visits the island for two days. 
On the first day, the reporter interviews all the inhabitants:
$\bullet$ The first one says: "There is exactly one villain on the island."
$\bullet$ The second says: "There are exactly two villains on the island."
$\bullet$ And so on until he reaches inhabitant number $2011$, who says: "There are exactly $2011$ villains on the island."
On the second day, the reporter interviews everyone again in the same order:
$\bullet$ The first says: "There is exactly one innocent on the island."
$\bullet$ The second says: "There are exactly two innocents on the island."
$\bullet$ And so on until he reaches inhabitant number $2011$, who says: "There are exactly $2011$ innocents on the island."
How many capricious are there on the island?


p4. Let $ABCDE$ be a regular pentagon such that the star $ACEBD$ has area $ 1$. Let $P$ be the intersection point of $AC$ and $BE$, let $Q$ be the intersection point of $BD$ and $CE$. Determine the area of quadrilateral APQD.
[img]https://cdn.artofproblemsolving.com/attachments/0/3/dcb0609bc85699b600b61ed97f6345a6b2b832.png[/img]


p5. Determine all positive integers $a, b, c, d$ with $a <b <c <d$, such that $\frac{1}{a}+ \frac{1}{b}+ \frac{1}{c}+ \frac{1}{d}$ an integer.
### Problem 1:
1. January has 31 days. If there are exactly four Mondays and four Fridays, then the month must start on a day that allows for this distribution.
2. Let's consider the possible starting days of January:
   - If January 1st is a Monday, then the Mondays are on 1, 8, 15, 22, 29 and the Fridays are on 5, 12, 19, 26.
   - If January 1st is a Tuesday, then the Mondays are on 7, 14, 21, 28 and the Fridays are on 4, 11, 18, 25.
   - If January 1st is a Wednesday, then the Mondays are on 6, 13, 20, 27 and the Fridays are on 3, 10, 17, 24, 31.
   - If January 1st is a Thursday, then the Mondays are on 5, 12, 19, 26 and the Fridays are on 2, 9, 16, 23, 30.
   - If January 1st is a Friday, then the Mondays are on 4, 11, 18, 25 and the Fridays are on 1, 8, 15, 22, 29.
   - If January 1st is a Saturday, then the Mondays are on 3, 10, 17, 24, 31 and the Fridays are on 7, 14, 21, 28.
   - If January 1st is a Sunday, then the Mondays are on 2, 9, 16, 23, 30 and the Fridays are on 6, 13, 20, 27.
3. From the above, the only possible starting days that fit the condition of exactly four Mondays and four Fridays are Tuesday and Saturday.
4. If January 1st is a Tuesday, then February 1st is a Friday.
5. If January 1st is a Saturday, then February 1st is a Thursday.

The final answer is \( \boxed{1, 2, 3, 6} \).