What is the sum of X+XX+XXX+XXXX?
Last Updated: 25.06.2025 00:35

What is the sum of X+XX+XXX+XXXX?
11010X
*Note that the abbreviation XL (for XXXX) appeared quite late in the Roman period, and never found universal favour
Elden Ring Nightreign maintenance makes matchmaking less of a headache - Eurogamer
and for binary would be
However, X +X^2 +X^3 + X^4 is a valid algebraic answer,
1234X
'AI Godfather' Warns Superintelligent Machines Could Kill Off Humans With Biowarfare - Decrypt
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)
It’s a matter of interpretation.
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
A Cosmic Tech Mystery Results in Literal Lost Souls in This Sci-Fi Short Story - Gizmodo