What is the sum of X+XX+XXX+XXXX?
Last Updated: 02.07.2025 03:53

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
1234X
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
Blink and your AI security playbook is out of date - Axios
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
and for binary would be
The Nippon Steel Deal: A Master Class in Winning the Working Class - The Free Press