Question number 11. Five big elephants and four small ones are walking along a path as shown. When they reach the junction, each elephant turns either to the left or to the right. Which of the following cannot be the situation after they all pass the junction? Typically, in questions like this, there's usually an easier solution than just seeing whether each one of these situations is possible. The first thing I want to notice here is that the last elephant in the line is a small elephant. What does that mean? That tells us that the last elephant to enter one of these forks has to be a small elephant, just because it's the last overall. So, one or both, possibly, but at least one of these two lines in the junction after this fork has to be a small elephant. Again, the last elephant in at least one of the junctions must be small. This is not the case for C, so it is the right answer in this case. This is an example of something where it might be easier to just do this method rather than actually going through and brute-forcing all of them. But if you want to be certain, you might have to do that. But this way will definitely help you get through the questions a lot faster.

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