What is the sum of X+XX+XXX+XXXX?
Last Updated: 25.06.2025 06:54

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
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
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)
Nonreciprocal light speed control achieved using cavity magnonics device - Phys.org
and for binary would be
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
3 keys to success every Citadel intern learns their first week on the job - Business Insider
1234X
It’s a matter of interpretation.
11010X