What is the sum of X+XX+XXX+XXXX?
Last Updated: 28.06.2025 23:38

11010X
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)
Alabama reports its first 2025 case of this dangerous virus - AL.com
and for binary would be
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
What is the sum of X+XX+XXX+XXXX?
What is the difference between the Bible and the Qur'an?
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
1234X
It’s a matter of interpretation.
‘Once in a Lifetime’ Photo of ISS Crossing the Sun as Solar Flare Erupts - PetaPixel