What is the sum of X+XX+XXX+XXXX?
Last Updated: 17.06.2025 05:55

It’s a matter of interpretation.
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)
11010X
My friend asked my crush and he said my crush hates me but not in a rude way. What does that mean?
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
1234X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Spiraling with ChatGPT - TechCrunch
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
and for binary would be
What is the sum of X+XX+XXX+XXXX?