If +, -, ÷, ×, =, > and < are denoted by Λ, V, Δ, , E, G, and L respectively, which of the following expressions is true?

If 'A' stands for '÷', 'B' stands for '×', 'C' stands for '+' and 'D' stands for '-', what will come in place of the question mark (?) in the following equation? 159 C 60 A 12 B 11 D 203 = ?

What will come in place of '?' in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged? 33 + 31 × 31 ÷ 2 - 49 = ?