Which one of the following gases has the highest

3% of 3000 x ?% of 2000 = 3600

125% of 80 – 6 × 4 = ? × 13 – 54

 {(481  + 426) 2 - 4 × 481 × 426} = ?

(5832)^1/3  × 10.11 × 11.97 ÷ 16.32 = ? + 45.022

28(4/5) + 52(1/2) × 8(2/7) - 11(1/5) = ? + 6(1/5)

If 1.123 × 3.211 = 3.122 + ______________, then the number in blank space is

1300% of 2341 + 1200% of 6321 = ?

What will come in the place of question mark (?) in the given expression?

(96 - 59) X 6 + ?² = 136.5 X 4

72% of 400 – 23% of 1020 = 120% of ? 

24² + 18 × 8 – ? = 356