
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
A pyramid of cubical blocks is arranged in four layers. The bottom layer consists of 15 blocks arranged in a specific pattern, the second layer has 9 blocks, the third consists of 6 blocks, and the top layer has one block. Each block’s number in the second, third, and fourth layer is the sum of the numbers of the three blocks directly below it from the previous layer. All blocks in the bottom layer are numbered from 1 to 15 in some order. Determine the smallest possible number which could be assigned to the top block.
A) 75
B) 119
C) 154
D) 190

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