Is one of the issues the most talked about in recent years. Many people joke that they are numbers, and others admit that they are letters. Although they are not saying it seriously, the truth is that their brains may be better to carry out one or other operations. The truth is that there are quite a few studies on it, so we should take this issue more seriously.
However, we have to ask ourselves, what is more difficult? Although some are better at one thing or another, the truth is that we have to get the logic out of everything. We, at least in our opinion, think that it is much more difficult to study subjects that include numbers, than those that include only letters. If you realize it, the world of mathematics it can be longer than it actually appears.
Mathematics includes a large number of problems and even texts that are solved using numbers and different types of formulas that, in turn, also have numbers. A paradox a little difficult to understand, at first, but that you will easily understand when you see an example.
In short, we think that the most complicated to learn are the numbers, due, above all, to their extension. Although we also recommend that you take a look at your brain and answer this question: for you, what is more difficult? You may even be able to handle both issues with more or less few difficulties or problems.