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

Last Updated: 01.07.2025 02:25

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

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

11010X

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

An 'invisible threat': Swarm of hidden 'city killer' asteroids around Venus could one day collide with Earth, simulations show - Live Science

and for binary would be

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

Demand in the Housing Market Just Got Even Worse, as Supply Piles Up - Wolf Street

It’s a matter of interpretation.

1234X

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

Trump calls Iran’s retaliatory strike ‘very weak,’ says country gave ‘early notice’ of attack - PBS