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

Example: divisibility by 3 in decimals (base 10) is as easy as summing the digits of the number and asking if the sum is divisible by 3. Are there easy rules for those listed above?

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

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