What is the sum of X+XX+XXX+XXXX?
14.06.2025 17:13

1234X
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
What is the sum of X+XX+XXX+XXXX?
What's the most trivial thing that ever made you go to the doctor?
It’s a matter of interpretation.
11010X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Is there anything wrong with me because I'm still single?
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,
and for binary would be