What is the sum of X+XX+XXX+XXXX?
12.06.2025 00:18

and for binary 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)
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
When did you realize that your childhood was not normal?
What is the sum of X+XX+XXX+XXXX?
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Can a bride cheat on her groom at a wedding?
11010X
1234X
It’s a matter of interpretation.