Rule of Nines
المؤلف:
Flannery, S. and Flannery, D.
المصدر:
In Code: A Mathematical Journey. London: Profile Books
الجزء والصفحة:
pp. 115-116
30-6-2020
1207
Rule of Nines
The divisibility test that an integer is divisible by 9 iff the sum of its digits is divisible by 9.
REFERENCES:
Flannery, S. and Flannery, D. In Code: A Mathematical Journey. London: Profile Books, pp. 115-116, 2000.
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