Given the decades-long market upswing followed by the recent downturn, you may have questions about if your money is really working for you. For instance, is it possible to make an average 25% rate of ...

Step aside, “girl dinner” — it’s time for “girl math.” Girl math revolves around justifying your spending habits in creative ways, like subscribing to the idea that if you buy clothes and later return ...

BALTIMORE -- A new personal finance trend has TikTok users recommending humorous new ways to rethink their spending habits. We've all justified unnecessary purchases before, but now social media has ...

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While I am financially savvy, I’m also into some lighthearted spending logic. And if your math brain works anything like mine, we might agree on some things: anything less than $5 is free; it’s smart ...

You pay for a latte with money from your Starbucks app, so your bank account balance doesn’t change. That means the coffee was basically free, right? This is just one example of “girl math,” a trend ...

Unfortunately, there is a new phenomenon that has slipped into our lexicon: girl math. It has inundated TikTok feeds and memes. You can laugh it off as just goofy stuff, but I think we have to take a ...

The Riemann Hypothesis is one of the most famous problems in that set. It’s about prime numbers. That’s any whole number that can only be divided by 1 and itself – like 2, 3, 5, 7 and 11.

We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple third-grade math problem manages to trip us up and make us question our ...

Mr. Musk faces financial challenges in owning Twitter. The site frequently loses money and took on $13 billion in debt for the blockbuster deal. By Lauren Hirsch Lauren Hirsch, who writes for DealBook ...

Historical math problems that once offered a $1 million prize for correct solutions.