Happy Square Root Day!

My mom just called to let me know it's square root day. 3.3.09 - three is the square root of nine, three times three equals nine.  I think it's pretty cool.  My kids are too young to have encountered square roots, but the older ones do know factors.  I will tell them today is a factor day and ask if any of them can come up with any future or past factor days (since this is the only one this year).  

Yay math!