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Excerpt: ...diagram annexed (Fig. 23). Here every condition of route exactly corresponds to that in the circular maze, only it is much less confusing to the eye. Now, the number of routes, under the conditions, from A to B on this simplified diagram is 640, and that is the required answer to the maze puzzle. FIG. 23.
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Amusements in Mathematics, Ernest Dudeney
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- 2013
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