This is a 5th grade math problem. . This is not a trick question. This is a real math problem so don't say that a bus has no legs. If you’d like to try your logic skills, post your answer to the question below. I’ll post the correct answer this evening. There are 7 girls in a bus. Each girl has 7 backpacks. In each backpack, there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus? Good luck!