I

hate math, but that's ok at CuriousMath, math is an attitude, and math is interesting. This site somehow kept my attention for 3 half a day when I found it a couple years ago. If you are impressed by those math tricks some folks do in their heads, it's here.

Available here is: Facts, Trivia & Fun - Tricks, Rules & Methods, and Math News. Math Forums, math products, math everywhere. From simple to advanced there something here to intrigue everyone. Not your everyday math site, for sure.

Here's a teaser:

1. Grab a calculator. (you won't be able to do this one in your head)

2. Key in the first three digits of your phone number (NOT the area code)

3. Multiply by 80

4. Add 1

5. Multiply by 250

6. Add the last 4 digits of your phone number

7. Add the last 4 digits of your phone number again.

8. Subtract 250

9. Divide number by 2

Do you recognize the answer?

Besides this type of thing, there are folks that have posted formulas for figuring out just about anything you can imagine. I must remember to give my collegue

"mathtalk-ga" this link! Check it out.