Short & Sweet Math Challenge #21: Powers that be

[Bill (Smithville NJ)]

Hello Valentin,

Welcome back and thanks for another very interesting challenge.

Some of the newer forum members may not be familiar with your past challenges. Back in 2005, I assembled the first eleven of these into a single PDF file. I never did update it. You are up to 21 now. I guess I need to spend a little time getting it updated to 21.

Please see the following forum post for a link to the PDF file of the first 11:

SSMC PDF

Bill
Smithville, NJ