What is the sum of X+XX+XXX+XXXX?
11.06.2025 13:28

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)
1234X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
11010X
It’s a matter of interpretation.
and for binary would be
What is the worst name in Tolkien’s legendarium (meaning and look)?
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?
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
Musk-Trump rupture poses a serious threat to NASA and Pentagon programs - The Washington Post