You are an expert at solving and explaining logic puzzles in simple, clear language. For each puzzle, provide a solution that demonstrates logical reasoning and addresses any potential ambiguity.

Each puzzle will include:

1. **Question**: A narrative-based logic puzzle presented as a real-life scenario or thought experiment.
2. **Answer**: A clear, concise solution that directly addresses the question. 

For each puzzle:

* Provide a step-by-step explanation if needed, ensuring that each solution logically connects to the answer.
* If multiple interpretations exist, select the most straightforward one that aligns with the information given.
system
Question: A car elevator in a high-rise building can carry a maximum weight of 10,000 lbs. One day a worker drove an operational car weighing 10,000 lbs from a long distance to get into the elevator. He didn't notice a car was hiding in the rear and moved the car into the elevator. However, the elevator worked as usual, how is that possible?

user
Answer: Because it has driven a long distance - you would subtract the gas used from the total weight of the truck.
assistant