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

Last Updated: 25.06.2025 05:11

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

11010X

It’s a matter of interpretation.

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

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and for binary would be

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

1234X

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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)

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?

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?