$$\sqrt{x}÷ \sqrt{144} = 0.02, $$ then the value of x is 

Simplify the following equation
$$ {\sqrt{(1-sin^{2}θ) ÷{(1-cos^{2}θ)}}}$$

Find the value of  

The largest number of five digits, which is a perfect square is 

The sum of the squares of 2 number is 146 and the square root of one of them is 5. The cube of the other number is 

In a group of 15 women, 7 have nose studs, 8 have ear rings and 3 have neither. How many of these have both nose studs and ear rings? 

2x + 4y – 8xy -1 =?