What is the sum of X+XX+XXX+XXXX?
15.06.2025 03:36

It’s a matter of interpretation.
and for binary would be
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
How do I get my body in shape?
1234X
11010X
What is the sum of X+XX+XXX+XXXX?
According to Trump, Ukraine started the war. Why?
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
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)
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,