Recently, I asked the BuzzFeed Community for their best math trick. I'm not talking quantum physics here, but just, you know, an easy way to figure out how much butter I need if I'm doubling a recipe.

Let’s get real for a second. Most people want to retire early, but think it requires a trust fund, a viral startup exit, or a crypto miracle. But the truth is way less glamorous and way more doable.

Add Yahoo as a preferred source to see more of our stories on Google. Math shouldn’t be harder than finding the last matching sock in your laundry. These clever shortcuts convert head-scratching ...