Dudeney number
In number theory, a Dudeney number in a given number base is a natural number equal to the perfect cube of another natural number such that the digit sum of the first natural number is equal to the second. 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.
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Dudeney number
In number theory, a Dudeney number in a given number base is a natural number equal to the perfect cube of another natural number such that the digit sum of the first natural number is equal to the second. 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.
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Dudeney nombro estas pozitiva ...... nerala metodo por radikeltiro.
@eo
Dudeneytal är ett positivt hel ...... deneytal är uppkallade efter .
@sv
In number theory, a Dudeney nu ...... al method for root extraction.
@en
Un nombre de Dudeney est un en ...... × 27 ; 27 = 1 + 9 + 6 + 8 + 3
@fr
Un nombre de Dudeney és un nom ...... 7 x 27; 27 = 1 + 9 + 6 + 8 + 3
@ca
Un numero di Dudeney è un inte ...... suoi puzzle, Root Extraction.
@it
Un número de Dudeney es un núm ...... enir Press, London, 1968, p 36
@es
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Dudeney nombro estas pozitiva ...... x 27 ; 27 = 1 + 9 + 6 + 8 + 3
@eo
Dudeneytal är ett positivt hel ...... deneytal är uppkallade efter .
@sv
In number theory, a Dudeney nu ...... al method for root extraction.
@en
Un nombre de Dudeney est un en ...... nombres de Dudeneyen base 10 :
@fr
Un nombre de Dudeney és un nom ...... molt pocs nombres de Dudeney:
@ca
Un numero di Dudeney è un inte ...... suoi puzzle, Root Extraction.
@it
Un número de Dudeney es un núm ...... enir Press, London, 1968, p 36
@es
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Dudeney number
@en
Dudeneytal
@sv
Nombre de Dudeney
@ca
Nombre de Dudeney
@fr
Nombro de Dudeney
@eo
Numero di Dudeney
@it
Número de Dudeney
@es