What is the sum of X+XX+XXX+XXXX?
Last Updated: 20.06.2025 01:30

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)
1234X
and for binary would be
What are the best items to buy from a furniture shop?
11010X
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 parts of the Bible, if any, are inappropriate to read to children? Why?
What is the sum of X+XX+XXX+XXXX?
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