Simplify `33xx33-33+33÷0`

3333 xx 333 xx 33 = ?

What should come in place of the question mark (?) in the following questions ? 333.33 + 33.33 + 3.3 = ?

What will come in place of question mark (?) . 33 xx 33 - ?^(1//2) + 10 xx 10 = 1068

The number of trees in different parks of a city are 33, 38, 48, 33, 34, 34, 33 and 24. The mode of this data is