
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
On May 12, 2008, a magnitude 8.0 earthquake occurred in Wenchuan, Sichuan Province, China. Due to a landslide, a depression near the Tangjiashan barrier lake began to fill with water continuously. Assuming the amount of water emerging every minute is constant, it would take 40 minutes to pump out the water with two pumps; with four pumps, it would take 16 minutes. How many pumps are needed to pump out the water within 10 minutes?

Present the answer in LaTex format: \boxed{Your answer}
user