Digital root number is the number mod 11 (Ɛ), for example, 1972 is 1 + 9 + 7 + 2 = 19 = 17 which is 1 + 7 = 8, while in decimal the root of the same number (3110) is 5; and in base 16 a digital root of a number is the number mod 15 (0xF), for example, 0x7DF is 7 + 13 + 15 = 35 = 0x23 which is 2 + 3 = 5, while in decimal the root of the same number (2015) is 8. Digital roots form an important mechanic in the visual novel adventure
Digital root the digital root of formula_46 modulo 9. Especially, we can define the digital root of minus formula_1 as follows: The digital root of formula_45 × formula_46 is digital root of the product of the digital root of formula_45 and the digital root of formula_46. This article is about the digital root in decimal or base ten, hence it is the number mod 9. It is nothing different as the number converted to base 9 and then only the last digit taken. In other radixes the digital root is number mod (base-1) so in base 12 a digital root of a