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Everything about Multiplicative digital root
Mathematical formula
In number theory, the multiplicative digital root of a natural number in a given number base is found by multiplying the digits of together, then repeating this operation until only a single-digit remains, which is called the multiplicative digital root of. The multiplicative digital root for the first few positive integers are:0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 4, 6, 8, 0, 2, 4, 6, 8, 0, 3, 6, 9, 2, 5, 8, 2, 8, 4, 0. Wikipedia →
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- Read the overview: Multiplicative digital rootA 5-minute orientation
- Pick up a classic book: Principles of internal medicineThe most-reprinted book on the subject
- Go sideways: Digital rootA closely related topic
- Go sideways: Dudeney numberA closely related topic
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📚 Books worth reading
Principles of internal medicineTinsley Randolph Harrison, Kurt J. Isselbacher · 1950
Clinical practice of the dental hygienistEsther M. Wilkins · 1958
Structure and Interpretation of Computer Programs (SICP)Harold Abelson, Gerald Jay Sussman · 1985
Signals and SystemsAlan V. Oppenheim, Alan S. Willsky · 1983
Digital planetGeorge Beekman, Ben Beekman · 2011
A companion to early cinemaAndré Gaudreault · 2012
Revealing ArithmeticKatherine A. Loop · 2009
Design of arithmetic units for digital computersJohn B. Gosling · 1980
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
đź”— Related topics
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