3
Part of 2009 Turkey MO (2nd round)
Problems(2)
Turkey NMO 2009 Q3
Source:
8/31/2010
Alice, who works for the Graph County Electric Works, is commissioned to wire the newly erected utility poles in days. Each day she either chooses a pole and runs wires from it to as many poles as she wishes, or chooses at most pairs of poles and runs wires between each pair. Bob, who works for the Graph County Paint Works, claims that, no matter how many poles there are and how Alice connects them, all the poles can be painted using not more than colors in such a way that no pair of poles connected by a wire is the same color. Determine the greatest value of for which Bob's claim is valid.
combinatorics proposedcombinatorics
Turkey NMO 2009 Q6
Source:
8/31/2010
If and are integers such that for every integer for some find the smallest possible value of
modular arithmeticfloor functionnumber theory proposednumber theory