Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

Converting between fractions, decimals and percentages is a useful problem-solving skill. The data can be more easily ordered by size when written in the same format. Calculations often give a decimal ...

Managing your inbox is a never-ending task, which is why we should seek to simplify it as much as possible. When emails pile up, you start overthinking what you need to do—I know I do, anyway. But if ...

Getting good sleep is critical. A 2018 study found that people who sleep for five to six hours are 19 percent less productive than people who regularly sleep for seven to eight hours per night. People ...

When you want to be more productive, it helps to have a role model. Financial blogs are forever interviewing contemporary CEOs about their work habits, but those aren’t that inspirational; they’re ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Ebony Howard is a certified public accountant and a QuickBooks ProAdvisor tax expert. She ...

Editor’s note: “Behind the News” is the product of Sun staff assisted by the Sun’s AI lab, which includes a variety of tools such as Anthropic’s Claude, Perplexity AI, Google Gemini and ChatGPT. Dewey ...

When I was in middle school, I had a classmate who would look at trigonometric functions and yell, "I will never need these!" ...

When students in Catherine Hartmann’s honors seminar at the University of Wyoming took their final exams this month, they encountered a testing method as old as the ancient philosophers whose ideas ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Charlene Rhinehart is a CPA , CFE, chair of ...

As sports betting has become increasingly popular, it's important to understand what you’re betting on, who to bet with but also what do betting odds mean and how they can differ. Figuring out how to ...