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

Last Updated: 02.07.2025 03:53

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

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

1234X

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

An Early Warning Sign of Dementia Risk May Be Keeping You Up at Night, Study Says - ScienceAlert

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)

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

Study Says If You're Over 50, Taking This Vitamin May Help You Live Longer - AOL.com

and for binary would be

It’s a matter of interpretation.

11010X

My Husband and I Need Advice/Help - Daily Kos