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 

$$ (17)^{2} + 6 × (13)^{2}-212×6$$

Simplify : $$ {(2x)^{2}-(2y)^{2}-(4x)^{2}}$$

If  $$\sqrt{2}=1.414$$, the value of $${ \sqrt{2}-1\over\sqrt{2}+1}$$  is nearest to 

The value of x in the given equation
$$ {23 ^2 + \sqrt{x}=625}$$

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

Evaluate: $$ {9।3-5।-5।-5।4।÷10\over-3(5)-2×4÷2}$$

The smallest number that must be subtracted from 1000 to make the resulting number a perfect square is