What is the sum of X+XX+XXX+XXXX?
Last Updated: 29.06.2025 07:13
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,
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?
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Blink and your AI security playbook is out of date - Axios
and for binary would be
1234X
11010X
SpaceX May Be Failing to Get Starship Working at All - futurism.com