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
Nth root positive "n"th root, called the principal "n"th root, which is written formula_6. For "n" equal to 2 this is called the principal square root and the "n" is omitted. The "n"th root can also be represented using exponentiation as "x". For even values of "n", positive numbers also have a negative "n"th root, while negative numbers do not have a real "n"th root. For odd values of "n", every negative number "x" has a real negative "n"th root. For example, −2 has a real 5th root, formula_29 but −2 does not have any real 6th roots. Every non-zero number "x",