0 the 24th letter of the English alphabet -- chữ cái X
‘Xylophone’ begins with an X.
1 a letter used to represent a number with an unknown value -- x trong công thức toán
2 a letter used to represent a name that is unknown or not named -- thay cho tên chưa biết
Imagine that Mr X left everything to his wife when he died, how much inheritance tax would she have to pay?
3 the Roman numeral for 10. -- 10 theo số La Mã
4 a mark used to represent a kiss, especially at the end of a letter. -- ký hiệu hôn cuối thư
5 used in the past to warn people that a film/movie was not suitable for people under the age of 18. -- phim cấm trẻ chưa đến tuổi vị thành niên