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

Last Updated: 16.06.2025 10:22

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

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

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

1234X

It’s a matter of interpretation.

My parents force me (15yo atheist) to go to church, and there’s this thing called Small Sundays where we discuss the Bible in groups, there are questions asked about the Bible. What am I supposed to do when they ask?

and for binary would be

11010X

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

How is it, in the USA, a country with 334 million people, the choice of President comes down to two aged men, one of whom is a liar as well as a criminal, one who appears to be on his way to dementia. Surely a democratic country can put up better?