[/quote]
,
,
.
passing through 
at point 
.
and 
be a triangle and 
points in the same plane such that 
,
,
.
is parallel to 
,
is the midpoint of segment 
,
and
meaning 
is the least common multiple of the numbers 
.
such that
for every positive integer 
such that 
for any relatively prime natural numbers 
.
is described on a circle 
,
be 
respectively. A circle with a center 
,
.
,
.
,
and lines 
,
and lines 
are concurrent.
is a divisor of 
.
,
and 
.
is prime, 
with 
and 
.
and 
are such that 
is a multiple of 
and 
is a multiple of 
be positive integers with 
.
,
,
,
,
,
positions to the right. Andrés and Beto alternate turns, starting with Andrés. The winner is the player who moves a token into the rightmost cell. Determine who has a winning strategy in terms of 
is mundane if there exist positive integers 
such that 
is a positive integer. Find, with proof, all prime numbers that are not mundane.
that has the following property: Any 
real numbers, not necessarily distinct, that lie in the interval ![$[100,101]$](http://latex.artofproblemsolving.com/8/e/3/8e3fe24e3b899bbf2128eebe08756e1ff963aaa0.png)
,
and 
such that
.
, 
and 
.
.
Y by Mango247
Let 
be the centre of the circumcircle of triangle 
and let 
be the centre of the incircle of triangle . A line passing through the point is perpendicular to the line 
and passes through the incircle at points 
and 
. Prove that the diameter of the circumcircle is equal to the perimeter of triangle 
.
be the centre of the circumcircle of triangle 
and let 
be the centre of the incircle of triangle . A line passing through the point is perpendicular to the line 
and passes through the incircle at points 
and 
. Prove that the diameter of the circumcircle is equal to the perimeter of triangle 
.This post has been edited 3 times. Last edited by Audiophile, Mar 30, 2021, 3:15 PM
Reason: French isn't rendered properly
Reason: French isn't rendered properly
and 
denote the circumradius and inradius of 
respectively.
.
.
