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

Last Updated: 16.06.2025 11:04

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

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

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

Why don't I want to talk to my girlfriend when she loves me a lot? I feel bored.

11010X

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

and for binary would be

I feel like my boyfriend doesn't love me. Why?

It’s a matter of interpretation.

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)

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