<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Mark wants to build a pyramid of soda cases that's four levels tall. Each level of the pyramid has a square base where each side is a certain length compared to the level above it. The top level is just one case. Mark needs 30 cases of soda. How much longer is each side of the base compared to the level above it? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
2
Mark wants to build a pyramid of soda cases that's four levels tall. Each level of the pyramid has a square base where each side is a certain length compared to the level above it. The top level is just one case. Mark needs 30 cases of soda. How much longer is each side of the base compared to the level above it?
test