If you’ve been playing Hogwarts Legacy for any lengthy of time, you have probably run into one of the above puzzle doors with triangles and numbers and symbols on them. Your reveal spell shows ...

To calculate the area of a composite shape you must divide the shape into rectangles, triangles or other shapes you can find the area of and then add the areas back together. You may have to calculate ...

Counting will get you nowhere. Try a little combinatorics instead. By Kenneth Chang A couple of weeks ago, I wrote about a viral math problem — 8÷2(2+2) = ? — that drew the disdain of many ...