At first, this looks like a very easy math puzzle. A group of 75 people is going on a boat tour. Each boat can hold 7 people. So the first thing most of us do is grab a calculator and divide 75...

Take a look at the two pictures we’ve set before you. At first glance, and maybe even a second, they might look exactly the same. You see a dad with glasses, leaning against a sofa and intently working on his laptop. Down...