Back with a math puzzle after a bit of a blogging break
It’s been too long. Here’s a short puzzle I saw that I thought was interesting:
How many prime numbers are there that start with a 1, alternate 1′s and 0′s, and end with a 1? Of course you should explain your answer…
The problem was originally stated in based 10, but I thought with a bunch of computer geeks in the audience, I’d ask about base 10 as well as binary and hexadecimal.