Howdy, formula boffins. Thought you might be interested about a series I started over at

You’ll find a whole bunch of tricky formula challenges posted by a group of excel nerds (me included) trying to out-nerd each other with formula nerdiness.

I also wrote up a series of blog posts covering this inaugural challenge, with the first one at (The next three posts are scheduled to be posted over the coming week).

These are great learning opportunities. For instance, a dude just posted another solution in the comments of this first post that uses a pandigital number. Very cool concept. See

Have at it!