What is the sum of X+XX+XXX+XXXX?
Last Updated: 24.06.2025 01:05

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
It’s a matter of interpretation.
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
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)
and for binary would be
Hubble Trouble Solved? Webb Telescope Finally Cracks the Universe’s Growth Mystery - SciTechDaily
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
1234X
What is the sum of X+XX+XXX+XXXX?
This Expensive-Looking Swivel Chair Will Almost Certainly Sell Out Again - HuffPost