What is the sum of X+XX+XXX+XXXX?
Last Updated: 30.06.2025 00:15

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)
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
and for binary would be
Samsung’s entry-level Galaxy Watch 7 has returned to its best price to date - The Verge
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
11010X
Doloremque harum est natus ipsum quasi at atque quam.
What is the sum of X+XX+XXX+XXXX?
It’s a matter of interpretation.
1234X