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

Last Updated: 02.07.2025 06:10

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)

1234X

and for binary would be

Queens of the Stone Age Announce Autumn 2025 Tour of North America - Pitchfork

It’s a matter of interpretation.

11010X

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

Eveniet dolor unde ut ut praesentium ut aperiam.

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

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

‘Knives Out 3’ Teaser: Daniel Craig’s ‘Wake Up Dead Man’ Sets December Release Date, Debuts Sinister First Footage - Variety