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

09.06.2025 10:05

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

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)

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

2000 times the volume of Earth! These scientists made a discovery, this planet in our solar system was twice as large 4.5 billion years ago. - Farmingdale Observer

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

It’s a matter of interpretation.

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

Why do I have the impression that almost all questions about advertising the flat Earth theory come from people who don't believe in a flat Earth themselves and are just provoking?

and for binary would be

1234X

11010X

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