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

Last Updated: 01.07.2025 16:09

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

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)

It’s a matter of interpretation.

and for binary would be

Monster black hole M87 is spinning at 80% of the cosmic speed limit — and pulling in matter even faster - Live Science

1234X

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

The Architect Behind Drake’s C$100 Million Toronto Mansion Designed This Muskoka ‘Castle’ - Mansion Global

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

11010X

NCAA approves multiple major rule changes in men's college basketball - On3.com