I learned something surprising this weekend. A rule I was taught back in elementary school turned out not always to be true. In the process, I discovered something worrisome about myself and how we ...

We collaborate with the world's leading lawyers to deliver news tailored for you. Sign Up for any (or all) of our 25+ Newsletters. Some states have laws and ethical rules regarding solicitation and ...

The method used to round numbers in accounting may portray an accurate or inaccurate appraisal of a company's financial condition. The amount of error increases with ...

Scientific American presentsMath Dudeby Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. In the last Math Dude episode, we learned the ins and outs of ...

Over the first four trading days of 2018, the Dow Jones industrial average, the Standard & Poor’s 500 and the Nasdaq Composite closed in record territory every day. Each of the bench marks passed some ...

Psychologists have discovered a “top-10 effect,” where people lump things into round-number groups and view everything else as inferior. The lesson? Never, ever be 11th. Nowhere is this tendency ...

It’s my annual "Taxes from A to Z" series! If you’re wondering whether you can claim wardrobe expenses or whether to deduct a capital loss, you won’t want to miss it. It's important to be accurate ...

Humans are remarkably good at estimating magnitudes. For example, we can estimate the amount of time it will take us to drive from point A to point B, so we know what time we should leave. We estimate ...

It’s so tempting to round off numbers and present your audience with pretty whole numbers rather than cluttering up the text with decimal points and a string of digits. Sometimes rounding a number up ...

Scientific American presentsMath Dudeby Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. At some point in your life, you were most likely taught how to ...