What is the sum of X+XX+XXX+XXXX?
11.06.2025 08:57
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
It’s a matter of interpretation.
and for binary would be
Experiment Reveals What Prolonged Fasting Actually Does to The Human Body - ScienceAlert
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)
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
11010X
Disney lays off hundreds of employees across film, TV and other units - CBS News
1234X
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 is the sum of X+XX+XXX+XXXX?