 ## QUICK! What's 2^12? No Cheating!

If you guessed 1024, you're wrong. 🙂 I was just asked this question not 20 minutes ago, and I choked, when the answer was in my hands, quite literally.

2... 4... 8... 16... 32... 64... 128... 256... 512... 1024... 2048... 4096!

Yes, the correct answer is 4096, not 1024, and you did it with just your fingers. So, if you're ever asked "What's 2^x", where x is some relatively small number that you can get to quickly, you know now to use your fingers. I'll show you an easy way to tackle it if 'x' is relatively large, again, without a calculator, but I'll save that for another post.

Make sure you keep this in mind, however. You never know when you'll be asked.

UPDATE: Some people have had trouble understanding my post, regarding counting binary on your fingers, so let me explain how to do so. First, we need to look at the mathematics of exponentials. Let's start at 2^0. It is defined as 1. What's 2^1? 2. 2^2 = 4, 2^3 = 8, 2^4 = 16, etc. See a pattern. The result of the expression is doubling for every exponent increase by 1.