How can you get 7 using only three 2s. You can use plus, minus, multiply, divide, square root, factorial, decimal point, log, “to the power of” and parentheses. As many times as you want. You can also put digits together to form … let’s say 22.

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.

You drive a car 30 mph on a 1 mile lap. How fast must you drive the 2nd lap to average 60 mph for both laps?

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)