What is the sum of X+XX+XXX+XXXX?
Last Updated: 24.06.2025 04:10

1234X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
It’s a matter of interpretation.
Which services sell most on Fiverr?
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)
and for binary would be
What do you think is the most powerful line in the song "Non, Je Ne Regrette Rien" by Édith Piaf?
What is the sum of X+XX+XXX+XXXX?
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
Full-screen Xbox handheld UI is coming to all Windows PCs “starting next year” - Ars Technica