Onesome: 303-- In what household product line is this number used as a size? Can you guess, or will you have to hit the link? I had no I idea about this one, and I cook. Twosome: 451-- Where is this number used in a title? Bonus: without Google, what is the significance of the number? I know it must be Farenheit 451 by Ray Bradbury. I read the novel many years ago but cannot recall the significance of it today. Threesome: 501-- Where is this number used to denote a style? Ah, you should know this one Shrink to fit and a button fly too.... Levi's 501 blues...