What is the sum of X+XX+XXX+XXXX?
Last Updated: 27.06.2025 17:34
11010X
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)
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Star-shaped brain cells may underpin the brain's massive memory storage - Live Science
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
What is the sum of X+XX+XXX+XXXX?
and for binary would be
It’s a matter of interpretation.
1234X
Pain relief breakthrough as scientists discover a safer, non-addictive approach - Earth.com