Bankrate on MSN

Rule of 72: What it is and how to use it

Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...
Investopedia

Leverage Ratio: What It Is, What It Tells You, and How to Calculate

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

What Is the Rule of 72 and How Can Investors Use It?

The Rule of 72 is an easy way to calculate how long it will take your investment to double in value. Here's how it works.
Hackaday

Calculator Battery Mod Lets You Go The Distance

Disposable batteries seem so 1990s. Sure, it’s nice to be able to spend a couple of bucks at the drugstore and get a flashlight or TV remote back in the game, but when the device is a daily ...

Are You Using Your Stud Finder Correctly? Here's How to Nail It Every Time.

It’s easy to mistake pipes, wiring, and more for a stud if you’re inexperienced. Follow our best tips for success every time.

Here's How To Use A Zircon Stud Finder

If you're trying to hang something on your wall, you'll need to use something like the Zircon Stud Finder to find where to safely hang items. Here's how.

One model of the world's first calculator is set for auction

NPR's Ailsa Chang speaks to mathematician Eugenia Cheng about the Pascaline -- a 17th-century invention credited as the first mechanical calculator.