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

Last Updated: 01.07.2025 00:49

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

11010X

1234X

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

Can the United States threaten the UK with destroying its economy to force it into anything, just like what happened in the Suez Crisis?

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)

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

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

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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

It’s a matter of interpretation.

and for binary would be

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