Want free lunch every day this work week? Mobile food trucks are giving away free goods in the Denny Triangle neighborhood from noon to 1 p.m. daily until this Friday, August 19. (Yesterday's vendor: Dante's Inferno Dogs.) To score grub, all you have to do is be one of the first 100 people to figure out the daily hint, which you can get by following @DowntownSeattle on Facebook and Twitter. Good luck!