Tag: counting

How many squares do you see?

If you enjoyed the Facebook math problem about PEMDAS, I’m sure you will love this second math problem about counting squares which I also got from Facebook. Problem How many squares do you see? Answers given in Facebook include 24, 25, 26, 27, 38, 34, 36, 40, 42. Solution Here’s how you can systematically count the

The Fundamental Counting Principle

Sometimes you wonder why they bother to teach you the formula for counting combination and permutation when most of the problems can’t be solved by any of them anyway. My advise when studying counting arrangements problem? Understand the multiplication principle, as in really understand it, before you get used to formulas. The Multiplication Principle. If