What is the sum of X+XX+XXX+XXXX?
12.06.2025 14:31
1234X
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
and for binary would be
Scientists Solve Decades-Old Cell Biology Mystery - SciTechDaily
*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?
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
Jennie Garth 'Never Felt More Confident' as She Poses In First Underwear Photoshoot at 53 - TooFab
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)
11010X
US-China trade war sideswipes Europe’s carmakers - politico.eu