If '×' means 'subtraction', '+' means 'division', '-' means 'addition' and '+' means 'multiplication', what will be the value of the following expression?
30 + [{(12 - 13) × (5 ÷ 2)} + (18 × 13)] 

Correct option is B

Decoding the information, 

Given:
30 + [{(12 - 13) × (5 ÷ 2)} + (18 × 13)] 
After replacing the signs from left to right and using the BODMAS rule,
30 ÷ [{ (12 + 13) -  (5 × 2)} ÷  (18 - 13)] 
= 30 ÷ { (25 - 10) ÷ 5}
= 30 ÷  (15 ÷ 5)
=  30 ÷ 3
= 10
Hence,  “10” is the correct answer.