Final Answer:
The completed mystery puzzle reveals a picture when cells are colored according to the key based on multiplication results (e.g., 0 = Tan, 1–20 = Gray, etc.). Since no specific cell values or instructions for coloring were provided in the text, and the image is not accessible, the answer cannot be uniquely determined from the given information alone.
However, based on standard versions of this type of worksheet (where each cell contains a multiplication problem like “7 × 8”, and you compute the product, then color by range), the final picture is typically a
rocket.
So, assuming it's the common version:
Rocket
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Parent Tip: Review the logic above to help your child master the concept of mystery picture multiplication worksheet.