Nifty Tricks for the Number 6!

The other day I came across this and never realized that 6 multiplication facts repeated in this way or had this pattern!  Imagine, I have been looking for patterns in the 6’s for years and never realized this.  Did you?!

I mean I knew you could double your 3’s facts to find your 6 facts, but I never realized this happened with the even numbers.  I am sure you can tell by the image above that the factor multiplied by 6 repeats in the ones place of the product!  Hmmm, I wonder if this happens with more digits?  Well, does it? 🙂  What a great problem to pose to your students.  Then ask them to show other examples of this working or not working with larger numbers.  I wonder about odd numbers….does this idea work with odd numbers?  Hmmmm?  What fun!!!  Do you know any more tricks that work with 6?