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portada Self Number
Type
Physical Book
Publisher
Language
English
Format
Paperback
Dimensions
0 x 0 cm
ISBN13
9786131172656

Self Number

New Book Imported to Taiwan
Delivery: 16 Oct - 26 Oct Shipping: 14 to 15 business days.
NT$ 5,535
NT$ 5,535

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Synopsis "Self Number"

High Quality Content by WIKIPEDIA articles! .A self number, Colombian number or Devlali number is an integer which, in a given base, cannot be generated by any other integer added to the sum of that other integer's digits. For example, 21 is not a self number, since it can be generated by the sum of 15 and the digits comprising 15, that is, 21 = 15 + 1 + 5. No such sum will generate the integer 20, hence it is a self number. These numbers were first described in 1949 by the Indian mathematician D. R. Kaprekar.In general, for even bases, all odd numbers below the base number are self numbers, since any number below such an odd number would have to also be a 1-digit number which when added to its digit would result in an even number. For odd bases, all odd numbers are self numbers.

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The book is written in English.

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The binding of this edition is Paperback.

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