Hopefully someone smarter (or more experienced) than me can explain a coulple of qbank questions that are frustrating me. 1. asked me to calculate anion gap, which I always thought was (Na + K) - (Cl + HCO3). The question gave me Na, Cl, and HCO3, so I figured I would plug in a reasonable number for K and choose the closest answer. I got this one wrong because they used the equation (Na) - (Cl + HCO3). So did I just learn the equation wrong, or is there a time when you would include K? 2. I got two behavioral questions about performing surgery on a woman with abdominal complaints and accidentally finding a mass on her ovary, which asked what would be your next coarse of action. One answer was to end the surgery and get consent from the woman, but another said to immediately remove the mass. Did anyone else get these two questions and figure out why they are different? Also, does anyone have any general advice for answering behavioral questions? I try to think of it like: What would the nicest Dr. in the world do? and answer them that way, but this doesn't always work. Thanks for your help.