
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
Andy started collecting coins for his new collection. He collected 10 coins on the first day. Each subsequent day, he collected 10 more coins than the previous day. For a span of 7 days, on the final day, in addition to the regular increase, he got an extra 20 coins from his grandfather. What was the average number of coins collected per day?

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