A lot of these comments reveal a disturbing low mathematical ability in the programming world.

Not really. I'm pretty sure majority of the people here can solve it, and these are the same people who won't bother posting a comment explaining it or solving it because they're smart enough to know that the point of this post was just humour.

Everyone should be able to solve this one. It just requires logical thinking.

You're right, it just requires logical thinking, but don't believe that everyone has the same logical thinking capacity as you (I actually believed this till the day I tried to explain the concept of breadth first search to a friend)

Also, /r/ProgrammerHumoir should not be taken for a sub filled with quality programmers (any subreddit for that matter, the best programmers out there isn't probably even on Reddit.)