All quizzes and intelligence tests have recently become very popular on the internet.
Everyone wants to try their hand at solving even the most complicated tasks. Most such puzzles appear to be easy, but the longer you think about them, the more different answers and ideas come to mind. Intelligence tests and logic puzzles have it within themselves to be tricky and require unconventional thinking. When you think you know the answer, it turns out that the solution is completely different and that you have chosen the wrong course of thought.
Particularly difficult puzzles can be solved only by a few with superior intelligence. They do not get bogged down by appearances and they look deeper, analyzing in detail all the possible options. Today we propose another intelligence puzzle. Apparently only 9% of the population gets it correct, so when you do that, you will belong to an outstanding group of elites. The task seems simple, but in fact it is not that easy.
The good news is that you do not have to calculate anything or have specialized knowledge. It can only come from basic knowledge of physics, specifically fluid mechanics and a keen eye. Take a close look at the picture below. You can see an unscrewed, open tap above container number 1 and 3 empty water tanks. Your task is to indicate which container fills with the liquid first. Pay attention to the layout of each drain
The solution and justification can be found on the next page.