What is the sum of X+XX+XXX+XXXX?
12.06.2025 00:47
and for binary would be
1234X
Given the use of upper case, I personally would initially assume Roman numerals*, so the answer would be C (100 in present-day decimal notation)
It’s a matter of interpretation.
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
As Kamala Harris weighs a run for governor, some Democrats are moving on - The Washington Post
as would be assuming that these are representations of conventional numbers, in which case the answer for number bases of five or more would be
11010X
What is the sum of X+XX+XXX+XXXX?