A fun math puzzle awaits you in the game Sorting by Shelves: Numbers. Your task is to clear the shelves of balls. Each ball has its own number, on the right side of the shelf you will find a number with an equal sign. This means that you must place number balls on the shelf that add up to a given amount. If the shelves do not have a numerical number with an equal sign, you must place three balls with the same numbers on each shelf in Sorting by Shelves: Numbers.