MathDB

p1. Consider this statement: An equilateral polygon circumscribed about a circle is also equiangular. Decide whether this statement is a true or false proposition in euclidean geometry. If it is true, prove it; if false, produce a counterexample.
p2. Show that the fraction

\frac{x^2-3x+1}{x-3}

has no value between

1

and

5

, for any real value of

x

.
p3. A man walked a total of

5

hours, first along a level road and then up a hill, after which he turned around and walked back to his starting point along the same route. He walks

4

miles per hour on the level, three miles per hour uphill, and

r

miles per hour downhill. For what values of

r

will this information uniquely determine his total walking distance?
p4. A point

P

is so located in the interior of a rectangle that the distance of

P

from one comer is

5

yards, from the opposite comer is

14

yards, and from a third comer is

10

yards. What is the distance from

P

to the fourth comer?
p5. Each small square in the

5

5

checkerboard shown has in it an integer according to the following rules: \begin{tabular}{|l|l|l|l|l|} \hline & & & & \\ \hline & & & & \\ \hline & & & & \\ \hline & & & & \\ \hline & & & & \\ \hline \end{tabular} i. Each row consists of the integers

1, 2, 3, 4, 5

in some order. ii. Тhе order of the integers down the first column has the same as the order of the integers, from left to right, across the first row and similarly fог any other column and the corresponding row.
Prove that the diagonal squares running from the upper left to the lower right contain the numbers

1, 2, 3, 4, 5

in some order.

PS. You should use hide for answers. Collected [url=https://artofproblemsolving.com/community/c5h2760506p24143309]here.

1962 MMPC

Subcontests

1962 MMPC , Part 2 = Michigan Mathematics Prize Competition