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x The LED Reader: Continued...   Step 7 of 7: Group Digits into Digit Groups:   The Digits as a Digit Goup:   The final answer is "12:39"!   The Original Image:   Once we have identifed the "1", "2", "3", and "9" Digits, we group them using math that you won't have to learn until college ...   The mathematical techniques used to combine similar digits into Digit Groups are called Linear Regression and K-Means Grouping and are very powerful techniques for deciding which Digits "belong together", but are also relatively complicated math.     Copyright (c) 2004, Blindsight Corp. All rights reserved.