Coding and Decoding Questions

If 20 - 10 means 200, 8 / 4 means 12, 6x2 means 4, then

100 - 10 x 1000/ 1000 + 100 x 10 = ?

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then

132 & 3 # 10 @ 20 % 2 = ?

If 18$2 = 10, 8$4 = 6 and 12$18 = 15, then find the value of 7$9 = ?

In a certain code language 'how many goals scored' is written as '5397'; 'many more matches' is written as '982'; and 'he scored five' is written as '163'. How is 'goals' written in that code language ?

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

18 + 12 ÷ 9 - 30 x 16 = 10

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "­" means "multiplied by", then

96 x 12 – 4 + 13 ÷ 21 = ?

If 60#40 = 10, 40#20 = 6 and 60#90 = 15, then find the value of 40#30 = ?

In a certain code, '247' means 'spread red carpet' ; '256' means 'dust one carpet' and '234' means 'one red carpet'. Which digit in that code means 'dust' ?