What is the sum of X+XX+XXX+XXXX?
13.06.2025 03:10

and for binary would be
11010X
It’s a matter of interpretation.
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
What is the sum of X+XX+XXX+XXXX?
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
Apple’s leaked 45W MagSafe charger is first to support Qi2.2 - The Verge
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
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
Incredible auroras delight stargazers in New Zealand photo of the day for June 2, 2025 - Space