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

11.06.2025 00:49

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)

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

How can a native English speaker say "it was nice talking to you" in French without using that exact phrase?

1234X

11010X

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

Will you share your wife? Can she take both of us at the same time?

It’s a matter of interpretation.

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

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