the unluckiest divisibility rules
26:00
the most viral "false" equation
15:26
The most creative digit sum problem I have ever seen!!
19:38
a prime example of an infinite matrix product
19:49
Picking a Logic for Science, Computation, or Data
19:03
have you seen this approach to means??
16:04
I solved this two ways -- which do you prefer??
16:16
infinitely many primes -- the topology way!
17:41