What is the sum of X+XX+XXX+XXXX?
10.06.2025 01:59

It’s a matter of interpretation.
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
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
What can help me fall asleep at night?
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)
What is the sum of X+XX+XXX+XXXX?
11010X
Why don't we hear our own snoring?
and for binary would be
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
1234X
How the Indiana Pacers Spun Style Into Substance - The Ringer