What is the sum of X+XX+XXX+XXXX?
14.06.2025 16:08

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
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)
and for binary would be
1234X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
If there was only one man remaining on the Earth, would this be regarded as extinction?
What is the sum of X+XX+XXX+XXXX?
11010X
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,