What is the sum of X+XX+XXX+XXXX?

Last Updated: 02.07.2025 11:22

What is the sum of X+XX+XXX+XXXX?

*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour

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

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)

New evidence suggests cosmic expansion may reverse and cause the Universe to implode in a spectacular finale - BBC Sky at Night Magazine

11010X

1234X

What is the sum of X+XX+XXX+XXXX?

What to Expect in Markets This Week: June Jobs Report, Independence Day Holiday - Investopedia

It’s a matter of interpretation.

and for binary would be

However, X +X^2 +X^3 + X^4 is a valid algebraic answer,

Roman Anthony changes to jersey number with a lot of Red Sox history - MassLive