When you were in school, you probably learned all sorts of quick math tricks, like how to multiply numbers with your hands or square large numbers (if not, you should brush up on those methods now). But those aren’t the only tricks you can do: there are a lot of quick solutions for real-world problems too, like converting standard time to military time, converting farenheit to celsius, and even figuring out the day of the week that any date falls on. The complexity of the problem may make it a bit longer than a few simple seconds, but it’s amazing what you can do with the right tricks up your sleeve.