The Fitbit Flex is an activity tracker aimed at measuring your exercise, diet and sleep. The device was my constant companion for about a week, and by the end of it, I felt informed about my activity levels, and was motivated to get moving.
Whether we like it or not, we're constantly judging the intelligence of others, estimating their level of competence by evaluating their responses to our questions. Some people are better at detecting intelligence than others, but that doesn't mean you can't learn how. With practice, you should be able to gauge the intelligence of others with a decent degree of accuracy, though you should always be prepared for surprises.
When you take an IQ quiz, they first set off your IQ as 100, which means if a ten-year-old and a twenty-year-old answers a question the same, their IQ score may be different. For example, IQ 148 means your IQ is higher than 100, the average IQ for your age. In addition, IQ doesn't really relate to how smart you are. It just means how your brain reacts on some ways.