In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 

To find the center of a coin, you can
Use a ruler

Clean paint brushes.
Soak brush in sink with warm water and dryer sheets for a few hours.

How can I keep a completed puzzle from coming apart?

Use a generous layer of clear mod podge over the front and back of the puzzle.