Date: Sat, 23 Aug 1997 19:10:47 -0400 (EDT)

From: Lori Herndon

I was given a math teaser. My teacher told me to pick any three digit # that didn't have a zero in the ones place. It was written twice, for example 448 would be written 448448. Then I was told to divide that # by thirteen, then take that answer and divide it by eleven, then take that answer and divide it by seven, and I got the answer of 448. Why is that?

My teacher told me it had something to do with prime factors. Thank you.