What is the sum of X+XX+XXX+XXXX?
13.06.2025 00:20
1234X
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
and for binary would be
Study Links Gut Bacteria to MS Risk and Reveals Key Triggers - Neuroscience News
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
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
Dinosaurs Had More Than Just Teeth—They Had Cancer, and It’s Changing Everything - The Daily Galaxy
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
What is the sum of X+XX+XXX+XXXX?
It’s a matter of interpretation.
What the ‘Revenge Tax’ Is in the Tax Bill—and How It Could Pummel the Dollar - Barron's