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

10.06.2025 13:20

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

It’s a matter of interpretation.

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?

If everyone in Russia dropped into holes in the ground only never to return, would that be good for NATO and international peacekeepers? Can we convince Russians to be less diabolical, so they coexist? Does Putin stink like doo doo in the commode?

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

11010X

1234X

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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

and for binary would be

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

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