The robber murdered the woman in cold blood for the sake

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

? = 90% of 25% of (40 × 200) + 300

(43/10) + (4.2/1.2) - (2.7/3) = (?/4) + (2.7/6.0)

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

{180 + (2250/15)} ÷ 11 = ?² + 14

(506 ÷ 22 + 9 × 3) × ? = 900 ÷ 9

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

(28/14) of 56 + ? = 920 ÷ 5

(880 ÷ 11 + 170) X ? = 40% of 1000 

(6² + 8² ) X ? = 80% of 500 - 25 X 4

(350/?) = 23 + 3³