The mean proportional of 18 and 2 is

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

30% of 50% of 1200 = 18/11 × ?

116 ÷ 280 of 1/2 + 3/5 × 5/3 = ?

63 × 4 = ?² – 1620 ÷ 5

((12+12+12+12)÷4)/((8+8+8+8+8+8)÷16) = ?

560 ÷ 14 × 3 – 25 = ?

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

(12.09)² × 5.98 ÷ 26.95 = ? + 25 

12% of 450 + 16% of 1500 = ?

(0.125)³÷ (0.25)² x (0.5)² = (0.5)^?-3

15% of 695 – 12.5% of 250 =? – 1200

17.5% of 400 – 24% of 150 = ?