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・ Dudelange Castle
・ Dudelange communal council
・ Dudelange Radio Tower
・ Dudelange-Burange railway station
・ Dudelange-Centre railway station
・ Dudelange-Usines railway station
・ Dudelange-Ville railway station
・ Dudeldorf
・ Dudeldorf Castle
・ Duden
・ Duden (disambiguation)
・ Duden (song)
・ Duden (surname)
・ Duden Park
・ Dudenevo
Dudeney number
・ Dudenhofen
・ Dudenhofen (Verbandsgemeinde)
・ Dudenville, Missouri
・ Duder
・ Duder Regional Park
・ Duderhof Heights
・ Duders Beach
・ Duders Hill
・ Duders Point
・ Duderstadt
・ Duderun
・ Dudes (album)
・ Dudes (film)
・ Dudes Are Pretty People


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Dudeney number : ウィキペディア英語版
Dudeney number
A Dudeney number is a positive integer that is a perfect cube such that the sum of its decimal digits is equal to the cube root of the number. There are exactly six such integers :
The name derives from Henry Dudeney, who noted the existence of these numbers in one of his puzzles, ''Root Extraction'', where a professor in retirement at Colney Hatch postulates this as a general method for root extraction.
== References ==

*H. E. Dudeney, ''536 Puzzles & Curious Problems'', Souvenir Press, London, 1968, p 36, #120.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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