What is the sum of X+XX+XXX+XXXX?
11.06.2025 00:15
What is the sum of X+XX+XXX+XXXX?
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
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
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)
11010X
It’s a matter of interpretation.
and for binary would be
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
1234X
AI could solve puzzles posed by twin stars in 'mere minutes or seconds on a single laptop' - Space