If '?' represents multiplication, '?' represents division, '?' represents addition, and '?' represents subtraction, what is the value of 9 ? 3 ? 2 ? 6?

A. 30

If '?' represents multiplication and '?' represents division, what is the value of 12 ? 4 ? 3?

B. 16

Using the symbols where '?' means addition, '?' means subtraction, '×' means multiplication, and '÷' means division, calculate 10 ? 5 ? 3 × 2 ÷ 1.

B. 25

If '>' represents greater than, '<' represents less than, '=' represents equal to, and '?' represents not equal to, which of the following statements is true? 5 < 8 and 8 > 3.

A. TRUE

In a certain code, 'A' means '+', 'B' means '-', 'C' means '×', and 'D' means '÷'. What is the result of 10 C 5 A 3 B 2 D 1?

A. 54