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

Last Updated: 02.07.2025 01:25

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

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

and for binary would be

Japan's 10,000-Year-Old Underwater 'Pyramid' Is Still One of the World’s Biggest Unsolved Mysteries—No One Knows Who Built It - The Daily Galaxy

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

1234X

It’s a matter of interpretation.

Harvard Asks For Summary Judgment in Funding Case, Says White House Pushed Cuts Despite Agency Objections - The Harvard Crimson

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)

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

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

Do you have any fantasies you are ashamed of?