What is the sum of X+XX+XXX+XXXX?
11.06.2025 08:34
What is the sum of X+XX+XXX+XXXX?
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)
It’s a matter of interpretation.
Trump’s trade war is bruising Apple — and your 401(k) - CNN
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
and for binary would be
Which bands became massively popular for covering songs rather than recording originals?
11010X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
1234X