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

Last Updated: 18.06.2025 01:22

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

1234X

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)

One Fitness Accessory Makes You Up to 7 Times More Likely to Stay Active - ScienceAlert

and for binary would be

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

11010X

For those who were actually old enough to have experienced the 1970s and not for those who were born in the 70s. What were the pros and cons of that era?

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

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

It’s a matter of interpretation.

Study Reveals How Much Exercise You Need Each Week to Control Blood Pressure - ScienceAlert