Problems(2)
System with 2024 variables, but how many are equal?
Source: Francophone 2024, Junior P1
4/4/2024
Find the largest integer with the following property: Whenever real numbers satisfy
at least of them are equal.
algebra proposedsystem of equationsalgebra
Pionocchio and Geppetto play a liar's game with polynomial values
Source: Francophone 2024, Senior P1
4/4/2024
Let and be two fixed positive integers. Pinocchio and Geppetto know the values of and and play the following game: In the beginning, Pinocchio chooses a polynomial of degree at most with integer coefficients. Then Geppetto asks him questions of the following form "What is the value of ?'' for . Pinocchio usually says the truth, but he can lie up to times. What is, as a function of and , the minimal number of questions that Geppetto needs to ask to be sure to determine , no matter how Pinocchio chooses to reply?
algebrapolynomialalgebra proposedgame