A lot of times when simplifying square roots incorrectly students will say, "Oh, well I have an x squared. So that means if I took the square root of that then I that will be just x. And here's a 9, ...

After seeing an exhibit of an old relay-based computer as a kid, [Simon] was inspired to build a simple two-relay latching circuit. Since then, he’s been fascinated by how relays can function to do ...