CAPTCHA. Top 10 Worst

According to Wikipedia, CAPTCHA is a computer test used to determine who the system user is: a person or a computer. The main idea of ​​the test: to offer the user a task that is easily solved by a person, but which is impossible (or extremely difficult) to teach a computer to solve.
True, sometimes it’s even difficult for a person to figure out what is shown in the picture, or solve a problem.
So, the top ten worst:





















Source: johnmwillis.com + several found on the network

In the comments, you can add your own options.