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How to Solve the fifteen number puzzle

A person manipulating a small electronic device with buttons.

During the video tutorial, you'll learn how to simply solve the easy and fun fifteen number puzzle. You'll learn a couple different moves to help you solve the 15 puzzle, which are called the curl and the box and twist. The curl is easy, but the box and twist is a little more complicated.

It is a sliding puzzle that consists of a grid of numbered squares with one square missing, and the labels on the squares jumbled up. The 15-puzzle is a classical problem for modeling algorithms involving heuristics.

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