What is the sum of X+XX+XXX+XXXX?
09.06.2025 01:43
What is the sum of X+XX+XXX+XXXX?
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)
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
What 10 things have you stopped doing in your life?
and for binary would be
11010X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Dollar General CEO turns heads with earnings-call comments - TheStreet
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
1234X
It’s a matter of interpretation.