What is the sum of X+XX+XXX+XXXX?
09.06.2025 00:45

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.
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
Is LGBTQ destroying the world?
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
11010X
What parts of the Bible, if any, are inappropriate to read to children? Why?
What is the sum of X+XX+XXX+XXXX?
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
and for binary would be
Cloudy skies can’t dim joy as thousands fill nation’s capital for World Pride parade - AP News