Another math riddle: how can you determine whether a number written in base 5 is divisible by 4? How about base 5 divisibility by 3?

PhD Student at Penn State. MLE, Quantum Computing, and Logic are my faves

“Good casts: eclectic, quirky, witty” - @botornot

I just love them :) nothing related to what I research tho :P

Yeah, math puzzles are fun :-) Was just looking at the wikipedia page for divisibility rule and saw the generalized divisibility rule section.

What're you researching?

I was disappointed that the wiki didn’t share the results for non base-10 cases! They deserve love too. 

My research is in logic > algorithmic information theory > effective fractal dimension. Answering questions like “what results in math hold when you can only do things computers (ie Turing machines!) can do?”