Direction: what should come in place at question mark(?).

45% of 224×?% of 120=8104.32

If 551 ÷ 29 = 19 then 5.51 ÷ 0.0019 = ?

(0.04)^-1.5 on simplification gives: 

The value of  

The value of is closest to 

Direction : What value should come in the place of question mark (?) in the following questions?

125% of 2440 – 75% of 1856 = ?

The smallest 4- digit number which is a perfect square is 

If then what does x equal to ?