Which variety of rice is tolerant to iron

(750 / 15 × 15 + 15² + 20% of 125) = ?³

26 ² – 13% of 400 + (529 ÷ 23 ² ) = ? ² 

104 × 21 ÷ 13 + ? % of 300 = 320 + 22

84% of 800 + 70% of 640 = 14 × ?

26% of 650 + 15% of 660 – 26% of 450 = ?

9/5 × 18/25 ÷ 42/21 = ? - 82/75

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

48 X 2.5 + 20% of 150 = ? + 166

18 × √225 + 378 ÷ √441 = ? × 9 

3.2% of 500 × 2.4% of ? = 288

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

18 × 16 – 11 × 4 = 15² + ?