 Hi, I'm Zor. Welcome to Inezor Education. I would like to start a completely new course, if you wish, or chapter of this website. It's called MES Plus and Problems. Well, let me first explain what I mean by MES Plus. We have already covered, basically, all the material, which is supposed to be in high school and maybe a little bit above, as far as the MES is concerned, in the previous course called MES 14s. So, what is MES Plus? It's not anything new, theoretically. However, the purpose of the whole course, which I'm starting today, is presenting the problem. So, it's the problems, which is the purpose. And plus means that the problems will be a little bit unusual, not typical problems, which are supposed just to check your theoretical knowledge. These problems are supposed to challenge your mind. Some of them might be kind of difficult. Some of them are problems which are presented on certain mathematical Olympics, so to speak, Olympiads. Well, there is an international mathematical Olympiads organization, which is organizing these Olympiads every year. So, some of them are taken from old textbooks, which I know about as really challenging ones. So, that's basically the purpose of this course. It's not typical, unusual, tricky, maybe, sometimes. They are really challenging. They're supposed to be really challenging your mind. So, that's the most important purpose of presenting all these problems. This, the whole course, will be just the problem-solving, basically. So, I will present the problem and basically allow you to stop the video and basically do it yourself, try to solve it yourself. Or you might take the textual part for each lecture, which I have here. And basically, the conditions of the problems are presented there. So, again, it's all supposed to challenge you, which means you have to really spend some time solving the problems yourself, before listening to whatever I'm saying about the solution. Also, I put in reference of the website. There is basically a menu option, references. I put the names of the books which I took it from. I think I covered all of them. I hope so. And finally, let me explain why I called this first introductory to this course. I called it Who Needs Problems. Well, basically, nobody needs problems. People need solutions. And what's the most important part is that every time you really face a real-life problem, which you need to solve somehow, it's usually not exactly the same as it was before. Or in many cases, it's not the same as before. And solutions which were offered by some other people before you, sometimes not really fit it. And you have to come up with a solution to something, at least completely or partially, maybe a new problem which you are facing. So, to have this solution, to come up with a solution, your mind must be, well, trained, must get used to facing the problems, which are not really explained to you in the theoretical material. It's really something which you have to really come up with yourself. That's your creativity. That's your logic. That's your analytical thinking. And that's the purpose, basically, of these problems which I'm going to present in this course. So, we need solutions. And to get to solutions, we have to train our mind to be able to face all these unusual circumstances. Well, that's it for an introductory. And the next thing is problems and their solutions, obviously. So, thanks very much and good luck.