Hosted by The Math Forum
Call an integer a two-three integer if it is greater than 1 and has the form
2^a 3^b,where a >= 0and b >= 0.Express 19992000 as a sum of two-three integers so that none of the summands divides another.Source: Eighth Korean Mathematical Olympiad (Crux Math. Dec 1999)© Copyright 2000 Stan Wagon. Reproduced with permission.