What is the sum of X+XX+XXX+XXXX?
09.06.2025 02:22

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
First glimpse of a charred scroll after two millennia thanks to AI and X-rays - Earth.com
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
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)
What is the sum of X+XX+XXX+XXXX?
Did you ever accidentally have sex with your brother/sister in India?
1234X
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
11010X
Stroll needed "urgent medical attention" for pain after qualifying - FIA · F1 - RaceFans