I offer to pay you $200 in one year if you give me $190 today. Good deal or bad deal? It’s the kind of math problem you might encounter in real life, as opposed to, say, whether the cosecant of a ...

If you’ve spent any time on TikTok in the last eight or so months, you’ve probably come across the concept of “girl math.” Essentially, it’s the idea that spending less money, or buying something on ...