What a bitter group about this. I don't do anything like what you all say. Either I'm waaayyy out on a limb, or I actually have something to contribute here.
I do something unexpected in response to tests. I often tickle women when they do this. It conveys a message "Say some silly test question and I'll tickle you. Then, I'll give you a totally irrelevant answer in my best attempt to be funny." It works pretty well. So does standing on my head in front of her in order to "think better". I encourage her to do the same. The first thing you know she thinks I'm crazy and we're both funny.
I've asked if I can use my lifeline. I've pretended to call my dad to ask if mom every did some similar lame test on him. I've asked for a pen and paper, looked very contemplative, and drawn a Tom & Jerry cartoon. I've asked for completely irrelevant power tools to solve a problem.
Lastly, for really irritating tests, I've indulged the common chick aversion to statistics and actual research. When I get a question like "Honey, how long do you think it will take until we know where this relatinship is going", I look up related links on the web about how long it takes according to Prof Soandso. Most women hate answers that involve statistics, math, or sports analogies. Tell her the situation is like the infield fly rule, or determining which NHL teams make the playoffs. Then go off on a tangent.
For tests like flirting with other guys, I think something similar to one dollar per pound approach mentioned earlier is good. Try telling the guy she's flirting with that if he can guess her weight and bra size he can have her for the night. Deer in car headlights or uncontrolled laughter.
Be funny. Be fast and funny if you can. Never let her see you sweat. Make her laugh if you can. That's what most tests are really about; can you make her happy, can you think on your feet, and can you deal with stress? Don't you think that's so Wyldfyre?