@ Kender:
First, I mean no offense to you. I remember seeing you back at HackQuest when I was first starting out, and I knew next to nothing, and I guess I'm still starstruck.
The probability and trigonometry challenges are word problems. I don't know how you could 'just plug those in'. Most of the others do give formulas, so your point is much more applicable there, but I still remember fighting with some of them to get the correct answer, and I did learn what it all meant in the process. It is not that I think you have no point at all. You do, but I don't think it is a strong enough point to justify not scoring those challenges. Some challenges are just easier than others. Some challenges are more prone to 'mindless' solutions. I could name another site, actually, where it is much easier, in my opinion, to get 12000 points, but I still think those challenges should be scored. They aren't worthless, just easy.
@sabretooth:
I must have solved at least half of CST's math challenges with pencil, paper, and calculator. That is my preferred method too, when the numbers aren't oppressive. Crunching numbers for the sake of crunching numbers isn't fun. Some combination of tools takes care of that. I don't feel any differently about that than I feel about using, say HashCat, to crack an MD5.
A different point: I think that as a site owner you could address these issues and create challenges in such a way that web searches can't give the answer and people can't just plug in a formula, but I don't think an 'aggregator' site like WeChall should get too much into policing the individual challenges offered on linked sites. I think you would end up with a messy and unfriendly situation very quickly.