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

Last Updated: 03.07.2025 03:32

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

It’s a matter of interpretation.

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

and for binary would be

Eastern District of Virginia | U.S. Government seizes approximately 145 criminal marketplace domains - Department of Justice (.gov)

1234X

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

Broadcom CEO On VMware Renewals, VCF Customers And Tomahawk 6 - CRN Magazine

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

*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)

Asteroid 2024 YR4 Could Strike the Moon: NASA’s Webb Telescope Warns - The Daily Galaxy