What does the symbol [X] mean?

Question

What does the symbol [X] mean?

Answer 1

In what case? In math, it could represent a number.

Answer 2

it may have different answers such as your solution to a question is wrong, x  variable where the value is unknown,but in school you will mostly find it to be the missing or unknown value to a problem.

Answer 3

X means ten (10) in roman numerals.

Or x marks the spot where something is hidden.

Or x (unknown quantity) in x-ray

Or Christ in X-mas (Christmas)

Or where something is omitted.

Answer 4

in what case?