What is the sum of X+XX+XXX+XXXX?
Last Updated: 02.07.2025 03:59

and for binary would be
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
Big Bang May Not Be The Beginning of Everything, New Theory Suggests - ScienceAlert
It’s a matter of interpretation.
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?
What does it mean if someone asks if it’s pink?
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
11010X
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
This brilliant, hidden iPhone feature lets you print anything to PDF - Boy Genius Report