What is the sum of X+XX+XXX+XXXX?
12.06.2025 08:32
11010X
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)
NASA is already great. Right now. - NASA Watch
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
Super-magnetic dead star throws a violent temper tantrum as NASA X-ray spacecraft looks on - Space
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
What is the sum of X+XX+XXX+XXXX?
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Where did Noah build the Ark? Was it in a desert or near water?