What is the sum of X+XX+XXX+XXXX?
10.06.2025 03:30

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
It’s a matter of interpretation.
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
Popular Processed Foods Linked to Early Signs of Parkinson’s Disease - SciTechDaily
and for binary would be
What is the sum of X+XX+XXX+XXXX?
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
1234X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Michaels buys Joann brand, plans to expand crafting supply to meet demand - ABC News