how do you handle stupid questions, and I mean really stupid, like they are asked either because the person is stupid themselves, or because they want to patronize you

questions like:

what color is a blue football or does toy story have any toys in it

those types of questions just irc me so much, and though I do want to give the person benifit of the doubt sometime, it sometimes generally feels that they are testing my patience

yesterday I was genrally asked: do you need to use the kettle to make a cold drink

ugg