Using only two 4’s how would you get 64? You can use standard mathematical functions found on a calculator – plus, minus, multiply, divide, to the power, log, square root, factorial…. Cannot use trigonometry or any other digit.
A bullet train starts from Atlanta to San Diego at 200mph. A freight train starts an hour later from San Diego for Atlanta at 80 mph. When they meet, which train is closer to Atlanta? (note that the actual distance does not really matter)