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

15.06.2025 09:12

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

11010X

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

It’s a matter of interpretation.

You hold the door open for a lady and she stops in her tracks and screams at you, ‘Don’t hold the door for me! I’ll get it myself!’ What are your feelings or immediate reaction?

and for binary would be

1234X

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

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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?

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