Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

{(540.34)/(17.99)} ÷ {(29.99)/(449.89)} × {1/(89.78)} = ?

What should come in place of the question mark (?) in the following mathematical statement?
$${{?^6÷16=108}}$$

115% of 4880 – 85% of 1640 = ?

If p – 2q = 4, then the value of p³ – 8q³ – 24pq – 64 is :

If a³ – b³ – c³ – 3abc = 0, then 

If p = 99, then value of p(p² + 3p + 3) is

The value of 4÷12 of [3÷4 of {(4-2) x 6÷2}] -2x6÷8+3 is:

if $${x\over 9}+{8\over x}=1$$, then the value of x³ is :