
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
Xiao Qiao places glass marbles into a rectangular box, doubling the number of marbles she puts in every minute. It takes her exactly 10 minutes to fill the box completely. At what minute is the box exactly half full?

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